Publications by authors named "Zhenzi Li"

49 Publications

O, S-Dual-Vacancy Defects Mediated Efficient Charge Separation in ZnInS/Black TiO Heterojunction Hollow Spheres for Boosting Photocatalytic Hydrogen Production.

ACS Appl Mater Interfaces 2021 Aug 3;13(31):37545-37552. Epub 2021 Aug 3.

Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China.

Defective ZnInS nanosheets/mesoporous black TiO heterojunction hollow spheres (H-ZIS/b-TiO) are prepared through hydrothermal and surface low-temperature hydrogenation strategies, which show broad-spectrum response and excellent charge separation efficiency. This H-ZIS/b-TiO flower-like heterojunction hollow spheres with a narrow band gap of ∼1.88 eV expand the light response to visible light and show excellent photocatalytic hydrogen evolution rate (278 μmol h 50 mg) under visible-light irradiation, which is 1.5 times as high as that of ZnInS/black TiO heterojunction hollow spheres (ZIS/b-TiO) (181 μmol h 50 mg). The excellent photocatalytic performance is due to the formation of O, S dual vacancies in b-TiO and H-ZIS providing more active sites for photocatalytic reaction and improving the charge separation efficiency, heterojunctions promoting transport of photogenerated carriers, and the hollow structure increasing light utilization by reflecting light. The novel heterojunction hollow sphere with high performance has broad application prospects in the field of energy.
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http://dx.doi.org/10.1021/acsami.1c10943DOI Listing
August 2021

Loss of longitudinal superiority marks the microarchitecture deterioration of osteoporotic cancellous bones.

Biomech Model Mechanobiol 2021 Oct 26;20(5):2013-2030. Epub 2021 Jul 26.

Zhongnan Hospital of Wuhan University, Wuhan, 430071, People's Republic of China.

Osteoporosis (OP), a skeletal disease making bone mechanically deteriorate and easily fracture, is a global public health issue due to its high prevalence. It has been well recognized that besides bone loss, microarchitecture degradation plays a crucial role in the mechanical deterioration of OP bones, but the specific role of microarchitecture in OP has not been well clarified and quantified from mechanics perspective. Here, we successfully decoupled and identified the specific roles of microarchitecture, bone mass and tissue property in the failure properties of cancellous bones, through μCT-based digital modeling and finite element method simulations on bone samples from healthy and ovariectomy-induced osteoporotic mice. The results show that the microarchitecture of healthy bones exhibits longitudinal superiority in mechanical properties such as the effective stiffness, strength and toughness, which fits them well to bearing loads along their longitudinal direction. OP does not only reduce bone mass but also impair the microarchitecture topology. The former is mainly responsible for the mechanical degradation of bones in magnitude, wherever the latter accounts for the breakdown of their function-favorable anisotropy, the longitudinal superiority. Hence, we identified the microarchitecture-deterioration-induced directional mismatch between material and loading as a hazardous feature of OP and defined a longitudinal superiority index as measurement of the health status of bone microarchitecture. These findings provide useful insights and guidelines for OP diagnosis and treat assessment.
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http://dx.doi.org/10.1007/s10237-021-01491-zDOI Listing
October 2021

Laparoscopic radical hysterectomy for cervical cancer by pulling the round ligament without a uterine manipulator.

Eur J Obstet Gynecol Reprod Biol 2021 Sep 1;264:31-35. Epub 2021 Jul 1.

Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China. Electronic address:

Objective: To demonstrate the experience of laparoscopic radical hysterectomy for cervical cancer without the use of a uterine manipulator and investigate the feasibility and treatment effectiveness of this surgical approach.

Materials And Methods: The laparoscopic radical hysterectomy for cervical cancer by pulling the round ligament without a uterine manipulator prevented the oppression of the uterine manipulator on the tumour. Vaginal ligation was performed below the lesion of cervical cancer, and the vagina was cut off below the ligation line. Consequently, the exposure of cancer tissues in the abdominal cavity was prevented, enabling a tumour-free operation. We reviewed the medical records of the 22 patients with stage IB1-IIA2 cervical squamous cell carcinoma who were treated at our hospital between May 2019 and February 2020. All the patients underwent the laparoscopic radical hysterectomy for cervical cancer by pulling the round ligament. All the patients were informed about the different therapeutic schemes and surgical approaches as well as their advantages and disadvantages. Information about operative time, intraoperative blood loss, hospitalisation duration, postoperative complications, postoperative adjuvant therapy, prognosis and other data were recorded.

Results: All the surgical procedures were successfully completed without perioperative complications, such as vascular injury, pelvic injury and abdominal organ injury. The mean operative duration was 204 min, and the mean operative blood loss was 102 mL. The mean duration of postoperative hospital stay was 13 days. Nineteen patients received postoperative chemotherapy once before hospital discharge. Urinary retention was the major postoperative complication. All the patients were followed up for 14-23 months. The median follow-up time was 18 months. 21 of the 22 patients survived. No recurrence was detected in the patients during follow-up. One patient who had a pelvic lymph node metastasis but refused complete chemoradiotherapy died before the last follow-up.

Conclusions: This surgical approach appears to be safe and feasible for patients with cervical cancer. A larger sample size and longer follow-up period are required to confirm whether this surgical approach can actually and effectively improve the prognosis.
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http://dx.doi.org/10.1016/j.ejogrb.2021.06.045DOI Listing
September 2021

Surface defects induced charge imbalance for boosting charge separation and solar-driven photocatalytic hydrogen evolution.

J Colloid Interface Sci 2021 Aug 24;596:12-21. Epub 2021 Mar 24.

Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China; School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, People's Republic of China. Electronic address:

Low charge separation efficiency of semiconductor materials is the main obstacle for high-performance photocatalyst. Herein, we report surface defects engineered uniform mesoporous TiO nanospheres (DMTNSs) through surfactant-mediated self-assembly solvothermal approach combined with hydrogenation strategy to promote charge separation. The surface defects induced charge imbalance result in the formation of built-in field, which can promote photogenerated charge separation efficiently and be confirmed by experimental and density functional theory (DFT) calculations. Under AM 1.5G irradiation, the photocatalytic hydrogen evolution of DMTNSs is ~3.34 mmol h g, almost 3.5 times higher than that of pristine non-defective TiO nanospheres (0.97 mmol h g), due to the engineered surface defects narrowing the bandgap (~3.01 eV) and inducing charge imbalance to boost spatial charge separation and extend visible-light response. The defect induced charge imbalance strategy opens a new valuable perspective for fabricating other high-efficient oxide photocatalysts.
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http://dx.doi.org/10.1016/j.jcis.2021.03.116DOI Listing
August 2021

Plasma Cu-decorated TiO/CoP particle-level hierarchical heterojunctions with enhanced photocatalytic-photothermal performance.

J Hazard Mater 2021 Jul 24;414:125487. Epub 2021 Feb 24.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China; Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China. Electronic address:

Plasma Cu-decorated TiO/CoP particle-level hierarchical heterojunction photocatalysts with surface engineering were fabricated through solvothermal and solid phase reduction strategies. The CoP nanoparticles not only serve as a cost-effective cocatalyst but also provide abundant surface active sites, which facilitate rapid transfer of photogenerated carriers. The Ti and oxygen vacancy defects extend photoresponse from UV to visible light region, and enhance the separation efficiency of photogenerated carriers efficiently. Because of surface plasma resonance (SPR) of Cu, Cu/TiO/CoP with average particle size of 100-200 nm has significant photothermal effect, in which the temperature of Cu/TiO/CoP is increased by 76 °C with irradiation for 30 s, ~ 8 times higher than that of the original TiO. Cu/TiO/CoP exhibits a high photocatalytic degradation rates for highly toxic 2,4-dichlorophenol (99.2%) and 2,4,6-trichlorophenol (98.5%), which higher 7.6 and 8.9 times than the initial TiO, respectively. Thanks to the particle-level hierarchical heterojunction, the efficient surface engineering and SPR effect favoring the spatial charge separation, Cu/TiO/CoP shows excellent photocatalytic-photothermal Performance. This particle-level hierarchical heterojunction architectural design provides a new insight for synthesizing particulate photocatalysts with high-efficiency.
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http://dx.doi.org/10.1016/j.jhazmat.2021.125487DOI Listing
July 2021

Zinc sulfide quantum dots/zinc oxide nanospheres/bismuth-enriched bismuth oxyiodides as Z-scheme/type-II tandem heterojunctions for an efficient charge separation and boost solar-driven photocatalytic performance.

J Colloid Interface Sci 2021 Jun 19;592:259-270. Epub 2021 Feb 19.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, People's Republic of China; Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China. Electronic address:

A novel zinc sulfide quantum dot (ZnS QD)/zinc oxide (ZnO) nanosphere/bismuth-enriched bismuth oxyiodide (BiOI) tandem heterojunction photocatalyst is fabricated through two-step solvothermal, calcination and one-step hydrothermal strategies. The successfully constructed core-shell nanostructure can increase the interface area and the active sites of the composite photocatalysts. The formation of a Z-scheme/Type-II tandem heterojunction favors the transfer and spatial separation of charge carriers, in which BiOI plays a bridging role to connect ZnO and ZnS. Simultaneously, the participation of BiOI significantly shortens the band gap of the composite photocatalyst. This dual functional [email protected]/ZnS composite photocatalyst has a high photocatalytic hydrogen evolution rate of 578.4 µmol gh and an excellent photocatalytic degradation efficiency for bisphenol A (BPA) and 2,4,5-trichlorophenol (TCP). In addition, cycling tests show that [email protected]/ZnS has a high stability, which is favorable for practical applications. This novel [email protected]/ZnS Z-scheme/Type-II tandem heterojunction photocatalyst will provide new ideas for the multichannel charge transfer of other highly efficient heterojunction photocatalysts.
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http://dx.doi.org/10.1016/j.jcis.2021.02.051DOI Listing
June 2021

[email protected] nano-heterojunction decorated self-floating carbon fiber cloth and enhanced solar-driven photothermal-photocatalytic performance.

Chemosphere 2021 May 31;271:129500. Epub 2020 Dec 31.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China; Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China. Electronic address:

The difficult recycle, secondary pollution and insufficient sunlight utilization of powder photocatalysts are main obstacles for practical applications. [email protected] heterojunction supported on surface of carbon fiber cloth (CC) are fabricated through hydrothermal in-situ growth method combined with ultrasonic loading strategy, which can be self-floated on water surface. [email protected]S nano-heterojunction with narrow band gap shows enhanced full spectrum absorption, which is in favor of improving the photocatalytic-photothermal performance. Self-floating CC as a substrate not only absorbs solar light converting to thermal energy, but also favors the recycle of catalysts. The resultant [email protected]/CC composite films exhibit excellent photothermal conversion performance and photocatalytic degradation activity for tetracycline hydrochloride in low temperature wastewater under simulated sunlight. Experimental results confirm that the superoxide group (·O) is the main factor for the robust catalytic performance. The good photothermal-photocatalytic performance can be ascribed to the efficient absorption of sunlight for self-floating characteristics and high charge carriers separation efficiency of [email protected] nano-heterojunction. This novel self-floating photothermal-photocatalytic film will have potential applications in fields of environment.
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http://dx.doi.org/10.1016/j.chemosphere.2020.129500DOI Listing
May 2021

Cadmium sulfide quantum dots/dodecahedral polyoxometalates/oxygen-doped mesoporous graphite carbon nitride with Z-scheme and Type-II as tandem heterojunctions for boosting visible-light-driven photocatalytic performance.

J Colloid Interface Sci 2021 Jan 26;582(Pt B):752-763. Epub 2020 Aug 26.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China. Electronic address:

It is known that fabrication of tandem heterojunctions between different types of heterojunctions can promote the charge separation. Herein, novel cadmium sulfide quantum dots (CdS QDs)/dodecahedral phosphotungstic acid potassium KPWO (KPW)/oxygen-doped mesoporous graphite carbon nitride (meso-g-CN) nanosheets tandem heterojunctions are prepared by the hydrothermal method combined with direct template calcination and in-situ chemical sedimentation strategy. The results show that tandem heterojunctions formed by the Z-Scheme heterojunction between CdS QDs and KPW and the type-II heterojunction between CdS QDs and meso-g-CN can extend the optical response into visible light region. Importantly, under visible light irradiation, photocatalytic hydrogen production rate and photocatalytic Cr removal rate over CdS/KPW/meso-g-CN is higher than that of KPW and CdS/KPW. This remarkable photocatalytic performance is due to the effective charge separation and transfer of the special tandem heterojunction structure. This novel tandem heterojunction will offer new insights for fabricating other high-performance photocatalytic systems.
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http://dx.doi.org/10.1016/j.jcis.2020.08.079DOI Listing
January 2021

Hollow Octahedral CuS/CdS/BiS p-n-p Type Tandem Heterojunctions for Efficient Photothermal Effect and Robust Visible-Light-Driven Photocatalytic Performance.

ACS Appl Mater Interfaces 2020 Sep 25;12(36):40328-40338. Epub 2020 Aug 25.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.

Reasonable design of the nanostructure of heterogeneous photocatalysts is of great significance for improving their performance and stability. We report the design and fabrication of hollow sandwich-layered octahedral CuS/CdS/BiS p-n-p type tandem heterojunctions constructed via the continuous growth deposition method on the surface of hollow octahedral CuS with well-defined structures and interfaces. The unique hollow sandwich nanostructure has a large specific surface area and abundant reaction sites and enhances the separation and transfer of photogenerated carriers. In addition, the formation of a p-n-p heterojunction coupled with the surface plasmon resonance effect of CuS could also aid in photocatalytic H evolution performance and photocatalytic degradation efficiency. Under vis-NIR light irradiation, the optimized CuS/CdS/BiS photocatalyst displays a notable H production rate of 8012 μmol h g, and 2,4-dichlorophenol is almost completely photocatalytically degraded in 150 min. This strategy and rational design offer a new path toward the design of specific nanocatalysts with enhanced activity and stability and challenging reactions.
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http://dx.doi.org/10.1021/acsami.0c11360DOI Listing
September 2020

Differential expression of skeletal muscle mitochondrial proteins in yak, dzo, and cattle: a proteomics-based study.

J Vet Med Sci 2020 Aug 9;82(8):1178-1186. Epub 2020 Jul 9.

Key Laboratory of Bioengineering & Biotechnology of State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou 730124, China.

Changes in yak mitochondria by natural selection in a hypoxic environment could be utilized to understand adaptation to low-oxygen conditions. Therefore, the differences in proteome profile of skeletal muscle mitochondria from yak, dzo, and cattle were analyzed by mass spectrometry, which were then classified into 3 groups, comparing between yak and dzo, yak and cattle, and dzo and cattle. 376 unique mitochondrial proteins were identified, including 192, 191, and 281 proteins in the yak-dzo, yak-cattle, and dzo-cattle groups, respectively. NRDP1 and COQ8A were expressed at higher levels in yak and dzo compared to those in cattle, indicating higher endurance capacity of yak and dzo in a low-oxygen environment. Gene Ontology (GO) terms of biological processes were significantly enriched in oxidation-reduction process, and that of molecular functions and cellular component were enriched in oxidoreductase activity and the mitochondrion, respectively. The most significantly affected pathways in Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis were Parkinson's disease, Huntington's disease, and oxidative phosphorylation between the yak-cattle and dzo-cattle groups; while metabolic pathways, citrate cycle, and carbon metabolism were significantly affected pathways in the yak-dzo group. ATP synthases, MTHFD1, MDH2, and SDHB were the most enriched hub proteins in the protein-protein interaction (PPI) network. These results indicated that mammals living at high altitudes could possibly possess better bioenergy metabolism than those living in the plains. The key proteins identified in the present study may be exploited as candidate proteins for understanding and fine-tuning mammalian adaptation to high altitudes.
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http://dx.doi.org/10.1292/jvms.19-0218DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7468061PMC
August 2020

[Knockdown of YTH N-methyladenosine RNA binding protein 2 (YTHDF2) inhibits cell proliferation and promotes apoptosis in cervical cancer cells].

Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2020 Mar;36(3):255-263

Department of Gynaecology and Obstetrics, Third Affiliated Hospital (Gener Hospital), Chongqing Medical University, Chongqing 401120, China. *Corresponding authors, E-mail:

Objective To investigate the effect of YTH N-methyladenosine RNA binding protein 2 (YTHDF2) knockdown on proliferation, cell cycle and apoptosis of cervical cancer cells. Methods Human Protein Atlas database was used to analyze the expression of YTHDF2 in cervical cancer and its relationship with the survival. Immunohistochemistry was performed to detect protein expression of YTHDF2 in 31 cervical cancer tissue samples and 31 normal cervical tissue samples. Then short hairpin RNAs (shRNAs) targeting YTHDF2 were designed and cloned into lentivirus expression vector. HeLa and SiHa cells were infected with the lentivirus. RNA and protein expression of YTHDF2 were measured by real-time quantitative PCR and Western blotting, respectively. Furthermore, CCK-8 assay and colony formation assay were conducted to detect the cell proliferation and flow cytometry was used to analyze the cell cycle and apoptosis. Results The database showed that cervical cancer patients with high YTHDF2 expression had poor prognosis. And YTHDF2 expression increased in the cervical cancer tissues compared with the normal tissues. Moreover, knockdown of YTHDF2 inhibited the cell proliferation, induced cell apoptosis, and arrested the cells at S phase in the HeLa and SiHa cells. Conclusion YTHDF2 expression is upregulated in cervical carcinoma. Knockdown of YTHDF2 can significantly inhibit cell proliferation and promote apoptosis in cervical carcinoma HeLa and SiHa cells.
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March 2020

NormAE: Deep Adversarial Learning Model to Remove Batch Effects in Liquid Chromatography Mass Spectrometry-Based Metabolomics Data.

Anal Chem 2020 04 24;92(7):5082-5090. Epub 2020 Mar 24.

Department of Epidemiology and Biostatistics, School of Public Health, Harbin Medical University, Harbin 150086, China.

Untargeted metabolomics based on liquid chromatography-mass spectrometry is affected by nonlinear batch effects, which cover up biological effects, result in nonreproducibility, and are difficult to be calibrate. In this study, we propose a novel deep learning model, called Normalization Autoencoder (NormAE), which is based on nonlinear autoencoders (AEs) and adversarial learning. An additional classifier and ranker are trained to provide adversarial regularization during the training of the AE model, latent representations are extracted by the encoder, and then the decoder reconstructs the data without batch effects. The NormAE method was tested on two real metabolomics data sets. After calibration by NormAE, the quality control samples (QCs) for both data sets gathered most closely in a PCA score plot (average distances decreased from 56.550 and 52.476 to 7.383 and 14.075, respectively) and obtained the highest average correlation coefficients (from 0.873 and 0.907 to 0.997 for both). Additionally, NormAE significantly improved biomarker discovery (median number of differential peaks increased from 322 and 466 to 1140 and 1622, respectively). NormAE was compared with four commonly used batch effect removal methods. The results demonstrated that using NormAE produces the best calibration results.
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http://dx.doi.org/10.1021/acs.analchem.9b05460DOI Listing
April 2020

Sandwich-like mesoporous graphite-like carbon nitride (Meso-g-CN)/WP/Meso-g-CN laminated heterojunctions solar-driven photocatalysts.

J Colloid Interface Sci 2020 May 17;568:255-263. Epub 2020 Feb 17.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China; Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China. Electronic address:

Three-dimensional mesoporous graphite-like carbon nitride (Meso-g-CN/WP/Meso-g-CN) laminated heterojunction nanosheets are successfully synthesized by solid-phase in situ reduction combined with high temperature calcination. Meso-g-CN/WP/Meso-g-CN has a relatively high specific surface area of 82 m g, a large pore size of 8-15 nm, and a narrow band gap of ~2.7 eV. The solar-driven photocatalytic reaction hydrogen production rate (~198.1 μmol hg) for Meso-g-CN/WP/Meso-g-CN 3D laminated heterojunctions is approximately 10 times higher than that of pristine g-CN. This discrepancy can be attributed to the synergistic effect of the 3D interbed heterojunction structure, which favors the spatial separation of photogenerated charge carriers due to its suitable band positions; its nanosheet structure, favoring the charge transfer to surface; and its mesoporous structures, offering more surface active sites and facilitating mass transfer. This novel sandwich-like laminated heterojunction structure offers new insights for the fabrication of other high-performance photocatalysts.
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http://dx.doi.org/10.1016/j.jcis.2020.02.060DOI Listing
May 2020

Identification immunophenotyping of lung adenocarcinomas based on the tumor microenvironment.

J Cell Biochem 2020 11 7;121(11):4569-4579. Epub 2020 Feb 7.

Department of Epidemiology and Biostatistics, School of Public Health, Harbin Medical University, Harbin, China.

The tumor immune microenvironment is heterogeneous, and its impact on treatment responses is not well understood. It is still a challenge to analyze the interaction between malignant cells and the tumor microenvironment to apply suitable immunotherapy in lung adenocarcinoma. We performed the nonnegative matrix factorization method to 513 messenger RNA expression profiles of lung adenocarcinomas (LUADs) from The Cancer Genome Atlas (TCGA) to obtain an immune-related expression pattern. Subsequently, we characterized the immune-related gene signatures and clinical and survival characteristics. We used 576 patients from Gene Expression Omnibus to confirm our findings. Of the patients in the training cohort, 51% had a high immune enrichment score, high expression of immune cell signaling, cytolytic activity, and interferon (IFN)-related signatures (all P < .05). We denoted these as the Immune Class. We further subdivided the Immune Class into two subclasses based on the tumor microenvironment. These were denoted the Active Immune Class and Exhausted Immune Class. The former showed significant IFN, T-cells, M1 macrophage signatures, and better prognosis (all P < .05), while the latter presented an exhausted immune response with activated stromal enrichment, M2 macrophage signatures, and immunosuppressive factors such as WNT/transforming growth factor-β (all P < .05). Furthermore, we predicted the response of our immunophenotypes to immunological checkpoint inhibitors (P < .05). Our findings provide a novel insight into the immune-related state of LUAD and can identify the patients who will be receptive to suitable immunotherapeutic treatments.
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http://dx.doi.org/10.1002/jcb.29675DOI Listing
November 2020

Dual plasmons-promoted electron-hole separation for direct Z-scheme BiOCl/AgCl heterojunction ultrathin nanosheets and enhanced photocatalytic-photothermal performance.

J Hazard Mater 2020 02 20;384:121268. Epub 2019 Sep 20.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China. Electronic address:

The dual plasmons (Bi, Ag)-based direct Z-scheme BiOCl/AgCl heterojunction ultrathin nanosheets are successfully synthesized by hydrothermal combined with solid-state reduction strategy. The plasmons Ag and Bi are formed during solid-state reduction process, which are firmly anchored on surface of BiOCl and AgCl, respectively, and favors the charge transfer obviously. Experiments results confirm the formation of heterojunction ultrathin nanosheets with the main size of 200∼300 nm and the thickness of <10 nm. The obtained dual plasmons-based direct Z-scheme BiOCl/AgCl heterojunction ultrathin nanosheets with the band gap of ∼1.66 eV exhibit excellent photothermal performance. 98.3% of Cr (VI) can be photocatalytic reduced and TOC removal rate of ceftriatone sodium reached 98.9% within 210 min, respectively. Due to the surface plasma resonance, the catalyst temperature increases obviously, indicating the enhanced photothermal performance, which is favorable for promoting the photocatalytic performance. Moreover, the cyclic stability experiment also proves the high stability and has advantages in practical applications. The excellent property can be ascribed to the direct Z-scheme accelerating charge transfer and prolonging the lifetimes, the dual plasmons enhancing photothermal performance and the spatial separation of photogenerated charge carriers.
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http://dx.doi.org/10.1016/j.jhazmat.2019.121268DOI Listing
February 2020

Promoted spatial charge separation of plasmon Ag and co-catalyst Co P decorated mesoporous g-CN nanosheet assembly for unexpected solar-driven photocatalytic performance.

Nanotechnology 2019 11 29;30(48):485401. Epub 2019 Nov 29.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, People's Republic of China.

Plasmon Ag and co-catalyst Co P decorated mesoporous graphite carbon nitride nanosheet assemblies have been synthesized via a template-calcination and ball milling strategy combined with photoreduction. The obtained composites are characterized by x-ray diffraction, Fourier transmission infrared spectroscopy, x-ray photoelectron spectroscopy, transmission electron microscopy, and UV-vis diffuse reflectance spectroscopy. The results show that the sample assembly with mesoporous structure has specific surface area of 50.4 m g, pore size of 11.3 nm and pore volume of 0.21 cm g. The Ag and Co P nanoparticles are decorated on the surface of graphite carbon nitride uniformly. Under solar light irradiation, the photocatalytic degradation rate of ceftazidime for the prepared sample assembly is up to ∼92%, and the photocatalytic reaction rate constant is about 10 times higher than that of bare graphite carbon nitride. Moreover, the sample assembly also exhibits a solar-driven photocatalytic hydrogen production rate of 96.66 μmol g h. It can attributed to the surface plasmon resonance effect of Ag nanoparticles and Co P co-catalyst promoting the spatial charge separation and the mesoporous structure providing more surface active sites and favoring mass transfer. This special structure offers new insights for fabricating other high-performance photocatalysts with high spatial charge separation.
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http://dx.doi.org/10.1088/1361-6528/ab3dd9DOI Listing
November 2019

Surface-defect-rich mesoporous NH-MIL-125 (Ti)@BiMoO core-shell heterojunction with improved charge separation and enhanced visible-light-driven photocatalytic performance.

J Colloid Interface Sci 2019 Oct 8;554:324-334. Epub 2019 Jul 8.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China. Electronic address:

Mesoporous NH-MIL-125(Ti)@BiMoO core-shell heterojunctions with surface defects were fabricated through a facile solvothermal method. The mesoporous core-shell structure with a large relative surface area of 87.7 m g and narrow pore size of 8.2 nm extends the photoresponse to the range of visible light due to the narrow band gap of ∼1.89 eV. The visible-light-driven photocatalytic degradation efficiency of highly toxic dichlorophen and trichlorophenol were 93.28 and 92.19%, respectively, and the corresponding rate constants were approximately 8 and 17 times higher than the rates achieved by pristine NH-MIL-125(Ti). The photocatalytic oxygen production rate was increased to 171.3 µmol g. Recycling for several cycles indicates high stability, which is favorable for practical applications. The excellent photocatalytic performance can be ascribed to the formation of the core-shell heterojunctions and to the surface defects that favor charge separation and visible light absorption; the mesoporous structure offers an adequate number of surface active sites and mass transfer. This novel mesoporous core-shell photocatalyst will have potential applications in the environment, and this strategy offers a new insight into fabrication of other high-performance core-shell structure photocatalysts.
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http://dx.doi.org/10.1016/j.jcis.2019.07.021DOI Listing
October 2019

All-Solid Z-Scheme Bi-BiOCl/AgCl Heterojunction Microspheres for Improved Electron-Hole Separation and Enhanced Visible Light-Driven Photocatalytic Performance.

Langmuir 2019 Jun 5;35(24):7887-7895. Epub 2019 Jun 5.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China , Heilongjiang University , Harbin 150080 , P. R. China.

All-solid Z-scheme Bi-BiOCl/AgCl heterojunction microspheres are successfully prepared via hydrothermal, NaBH reduction and chemical deposition strategy. They are tested by various characterization methods, and they show that metal Bi is present after reduction and AgCl nanoparticles are successfully compounded onto BiOCl. Bi plays the role of a bridge connecting the two semiconductors of BiOCl and AgCl. All-solid Z-scheme heterojunction structures are formed successfully. The narrow band gap of the Z-scheme Bi-BiOCl/AgCl heterojunction microspheres is about 2.17 eV, which can expand the optical response range. Moreover, the photocatalytic hydrogen production rate still reaches 198.2 μmol h g, extends the electron transport life, inhibits the recombination of electron hole pairs, and improves the photocatalytic activity.
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http://dx.doi.org/10.1021/acs.langmuir.9b00581DOI Listing
June 2019

Nano-zero-valent iron and MnO selective deposition on BiVO decahedron superstructures for promoted spatial charge separation and exceptional catalytic activity in visible-light-driven photocatalysis-Fenton coupling system.

J Hazard Mater 2019 Sep 27;377:330-340. Epub 2019 May 27.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China. Electronic address:

Novel nano-zero-valent iron (Fe)/MnO/BiVO ternary magnetic assemblies are fabricated through hydrothermal and photo-deposition strategy. The assemblies are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, photoluminescence, X-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectroscopy. Fe as a reduction cocatalyst are deposited on surface of monoclinic BiVO decahedron supersturcture. Meanwhile, MnO as an oxidation cocatalyst is selectively anchored on oxidative {110} facet of BiVO by photodeposition. The photogenerated electrons and holes can be transmitted to Fe and MnO, respectively, which favors the spatial charge separation. The adjunction of Fe significantly enhances light absorption, and forms a photocatalysis-Fenton coupling system simultaneously. The assemblies with narrow band gap of 2.10 eV display an exceptional photocatalytic activity, and the visible-light-driven photocatalytic degradation ratio of 2,4-dichlorophenol and Bisphenol A are up to 95.4 and 91.4%, respectively, which are several times higher than that of pristine BiVO. This is ascribed to the selective decoration of Fe and MnOx favoring the spatial charge separation, and the photocatalysis-Fenton coupling system enhancing degradation. Moreover, the superior magnetic property due to Fe decoration realizes magnetic separation of catalysts, which is favorable in practical applications.
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http://dx.doi.org/10.1016/j.jhazmat.2019.05.061DOI Listing
September 2019

WaveICA: A novel algorithm to remove batch effects for large-scale untargeted metabolomics data based on wavelet analysis.

Anal Chim Acta 2019 Jul 19;1061:60-69. Epub 2019 Feb 19.

Department of Epidemiology and Biostatistics, School of Public Health, Harbin Medical University, Harbin, 150086, China. Electronic address:

Metabolomics provides new insights into disease pathogenesis and biomarker discovery. Samples from large-scale untargeted metabolomics studies are typically analyzed using a liquid chromatography-mass spectrometry platform in several batches. Batch effects that are caused by non-biological systematic biases are unavoidable in large-scale metabolomics studies, even with properly designed experiments. The statistical analysis of large-scale metabolomics data without managing batch effects will yield misleading results. In this study, we propose a novel algorithm, called WaveICA, which is based on the wavelet transform method with independent component analysis, as the threshold processing method to capture and remove batch effects for large-scale metabolomics data. The WaveICA method uses the time trend of samples over the injection order, decomposes the original data into multi-scale data with different features, extracts and removes the batch effect information in multi-scale data, and obtains clean data. The WaveICA method was tested on real metabolomics data. After applying the WaveICA method, scattered quality control samples (QCS) and subject samples in a PCA score plot of the original data were closely clustered, respectively. The average Pearson correlation coefficients for all peaks of the QCS increased from 0.872 to 0.972. Additionally, WaveICA significantly improved the classification accuracy for metabolomics data. The method was compared with three representative methods, and outperformed all of them. To conclude, WaveICA can efficiently remove batch effects while revealing more biological information. This method can be used in large-scale untargeted metabolomics studies to preprocess raw metabolomics data.
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http://dx.doi.org/10.1016/j.aca.2019.02.010DOI Listing
July 2019

Surface plasma Ag-decorated single-crystalline TiO(B) nanorod/defect-rich g-CN nanosheet ternary superstructure 3D heterojunctions as enhanced visible-light-driven photocatalyst.

J Colloid Interface Sci 2019 Apr 30;542:63-72. Epub 2019 Jan 30.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China. Electronic address:

Ag-TiO(B)/g-CN ternary heterojunctions photocatalysts are fabricated by hydrothermal-calcination, photo-deposition procedure, and followed by in-situ solid-state chemical reduction procedure. As-obtained photocatalysts are consisted with heterojunctions between 2D g-CN sheets and 1D TiO(B) single-crystalline nanorods. The band gap of Ag-TiO(B)/g-CN ternary heterojunctions photocatalysts is reduced to ∼2.23 eV due to plasma Ag and surface engineering. Under visible light irradiation, it has an optimal photocatalytic property for the reduction of Cr (95%) and degradation of NH (93%). The apparent reaction rate constants (k) of ternary heterojunctions photocatalysts for NH and Cr are 25 and 12 folds higher than that of original TiO(B). Furthermore, Ag-TiO(B)/g-CN also has excellent hydrogen production efficiency, which is up to 410 µmol h g. This enhancement can be attributed to the unique heterojunction formed by 1D single-crystalline TiO(B) nanorods and 2D g-CN sheets, surface plasma resonance effect of plasma Ag nanoparticle, and surface engineering. A possible photocatalytic mechanism is also proposed by analysizing the XPS valence-band spectra and the Mott-Schottky.
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http://dx.doi.org/10.1016/j.jcis.2019.01.124DOI Listing
April 2019

Oxygen-Doped MoS Nanospheres/CdS Quantum Dots/g-CN Nanosheets Super-Architectures for Prolonged Charge Lifetime and Enhanced Visible-Light-Driven Photocatalytic Performance.

ACS Appl Mater Interfaces 2019 Feb 5;11(7):7104-7111. Epub 2019 Feb 5.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China , Heilongjiang University , Harbin 150080 , P. R. China.

Oxygen-doped MoS nanospheres/CdS quantum dots/g-CN nanosheets are synthetized through hydrothermal and chemical bath deposition-calcination processes. The prepared materials are characterized by X-ray diffraction transient-state photoluminescence spectra, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and electrochemical experiment. These results show that the ternary composite material has longer lifetime of photogenerated carriers and more active sites, thereby enhancing photocatalytic performance. CdS quantum dots act as a bridge between the intermediate transport charges in the ternary composite. The oxygen defect engineering prolongs the lifetime of carriers obviously, which is confirmed by transient-state photoluminescence. Moreover, the photocatalytic H evolution and photodegradation of bisphenol A for MoS/CdS/g-CN is up to 956 μmol h g and 95.2% under visible-light irradiation, respectively. Furthermore, excellent photocatalytic activity can be ascribed to the synergistic effect of defect engineering and formation of ternary heterostructures, which is with broad-spectrum response, longer lifetime of photo-induced electron-holes, and more surface active sites.
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http://dx.doi.org/10.1021/acsami.8b21131DOI Listing
February 2019

Assembly of surface-defect single-crystalline strontium titanate nanocubes acting as molecular bricks onto surface-defect single-crystalline titanium dioxide (B) nanorods for efficient visible-light-driven photocatalytic performance.

J Colloid Interface Sci 2019 Mar 14;537:441-449. Epub 2018 Nov 14.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China. Electronic address:

Ti self-doped single-crystalline SrTiO nanocubes acting as molecular bricks are successfully assembled onto Ti self-doping single-crystalline TiO(B) nanorods through an effortless two-step hydrothermal process coupled with an in situ solid-state chemical reduction method. SrTiO nanocubes act as molecular bricks, which are uniformly assembled onto the surface of TiO(B) nanorods due to lattice matching. The band gap of the resultant SrTiO/TiO(B) sample is ∼2.97 eV, which exhibits excellent photocatalytic performance for the reduction of Cr(VI) and hydrogen production under visible light. The apparent rate constant k value for the photocatalytic reaction of SrTiO/TiO(B) for Cr(VI) reduction is ∼8 times higher than that of white TiO(B). The photocatalytic hydrogen production rate for SrTiO/TiO(B) is ∼160.2 μmol g h, which is ∼5 times higher than that of white TiO(B). The enhanced photocatalytic activity can be considered to be caused by a synergetic effect of heterojunction formation and the introduction of Ti self-doping, which can not only facilitate the separation of photogenerated charge carriers between TiO(B) and SrTiO, but also broaden the photoresponse from the UV to visible-light region.
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http://dx.doi.org/10.1016/j.jcis.2018.11.053DOI Listing
March 2019

Synergistic effect of surface plasmon resonance, Ti and oxygen vacancy defects on Ag/MoS/TiO ternary heterojunctions with enhancing photothermal catalysis for low-temperature wastewater degradation.

J Hazard Mater 2019 Feb 13;364:117-124. Epub 2018 Oct 13.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, PR China. Electronic address:

Ag/MoS/TiO ternary heterojunctions are fabricated through hydrothermal and photo-deposition process combine with in-situ solid-state chemical reduction approach. The prepared materials are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, photoluminescence, and X-ray photoelectron spectroscopy. The results show that the ternary heterojunctions doped with Ti are formed, meanwhile, Ag nanoparticle and MoS nanosheets are anchored on surface of TiO nanobelts simultaneously. The photocatalytic degradation ratio of Bisphenol A in low temperature water and hydrogen production rate for Ag/MoS/TiO are up to 96.7% and ∼1.98 mmol h g, respectively, which are several times higher than that of pristine TiO. Furthermore, the photothermal performance of Ag/MoS/TiO is also unexpected. The excellent photocatalytic activity and photothermal performance can be ascribed to the synergistic effect of the formation of heterojunctions, Ti and surface oxygen vacancies defects and surface plasmon resonance of Ag nanoparticles, which extend the photoresponse to visible-infrared light region and favor the spatial separation of photogenerated charge carriers.
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http://dx.doi.org/10.1016/j.jhazmat.2018.09.097DOI Listing
February 2019

Wide spectral response photothermal catalysis-fenton coupling systems with 3D hierarchical FeO/Ag/BiMoO ternary hetero-superstructural magnetic microspheres for efficient high-toxic organic pollutants removal.

J Colloid Interface Sci 2019 Jan 17;533:24-33. Epub 2018 Aug 17.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China. Electronic address:

3D hierarchical FeO/Ag/BiMoO magnetic microspheres are fabricated through hydrothermal-photoreduction strategy, which fabricate an advanced photocatalytic-Fenton coupling system. The HO produced by photocatalysis could form the photo-Fenton system when combined with FeO under light illumination. The introduction of Ag nanoparticles could induce the localized surface plasmon resonance (LSPR), which provides "hot electrons" for promoting photocatalysis. The addition of FeO achieve the successful coupling of photocatalysis-Fenton, and enhanced the broad spectrum response of the final composite sample. The 3D hierarchical FeO/Ag/BiMoO exhibit excellent UV-Vis-NIR-driven photocatalytic performance for mineralization of high-toxic Aatrex and Bisphenol A. The addition of magnetic FeO is conducive to the magnetic separation, which favors practical application. The strategy provides thought-provoking insights for constructing new types of high-performance photocatalytic system.
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http://dx.doi.org/10.1016/j.jcis.2018.08.047DOI Listing
January 2019

Identification of pathway-based recurrence-associated signatures in optimally debulked patients with serous ovarian cancer.

J Cell Biochem 2018 11 20;119(10):8564-8573. Epub 2018 Aug 20.

Department of Epidemiology and Biostatistics, School of Public Health, Harbin Medical University, Harbin, China.

Serous ovarian cancer (SOC) is the most common form of the histological subtype of epithelial ovarian cancer, with the worst clinical outcome. Despite improvements in surgery and chemotherapy, most patients with SOC experience recurrence within 12-18 months of first-line treatment. Current studies are unable to robustly predict the recurrence of SOC, and more accurate predictive models are urgently required. We have, therefore, developed a novel pathway-structured model to predict the recurrence of SOC. We trained the model on a set of 333 patients and validated it in 3 diversified validation datasets of 403 patients. Genes significantly associated with recurrence within each pathway were identified using a Cox proportional hazards model based on LASSO estimation in the training dataset. Next, a pathway-structured scoring matrix was obtained after computation of the prognostic score for each pathway by fitting to the Cox proportional hazards model. With the pathway-structure scoring matrix as an input, the pathway-based recurrent signatures were identified using the Cox proportional hazards model based on LASSO estimation and the significant pathway-based signatures were externally validated in 3 independent datasets. Meanwhile, our pathway-structured model was compared with a commonly used gene-based model. Our results revealed that our 12 pathway-based signatures successfully predicted the recurrence of SOC with high accuracy in the training dataset and in the 3 validation datasets. Moreover, our pathway-structured model was superior to the gene-based model in 4 datasets. The pathways selected in our study will provide new insights into the pathogenesis and clinical treatments of SOC.
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http://dx.doi.org/10.1002/jcb.27098DOI Listing
November 2018

Sites of distant metastases and overall survival in ovarian cancer: A study of 1481 patients.

Gynecol Oncol 2018 09 9;150(3):460-465. Epub 2018 Jul 9.

Department of Epidemiology and Biostatistics, School of Public Health, Harbin Medical University, Harbin 150086, People's Republic of China. Electronic address:

Objective: To assess the association between patterns of distant metastases and overall survival in metastatic ovarian cancer and identify prognostic factors for site-specific distant metastases.

Methods: Data was obtained from the SEER database between 2010 and 2014. Univariate and multivariate Cox proportional hazard models were used to identify variables associated with overall survival. Survival times between different groups were compared using Kaplan-Meier analysis and log-rank tests.

Results: We analyzed 1481 patients. The most common distant metastatic site was liver, followed by distant lymph nodes, lung, bone, and brain. The site of distant metastases was an independent prognostic factor for overall survival. Using liver metastases as reference, overall survival was lower for lung metastases (p = 0.0297) and higher for distant lymph node metastases (p = 0.0006). Using distant lymph nodes as reference, distant metastases to the liver (p = 0.0006), lung (p < 0.0001), brain (p = 0.0455), and bone (p = 0.0138) were all associated with worse overall survival. The number of metastatic sites did not affect overall survival. We also found that surgery and chemotherapy affected overall survival for patients with distant lymph node metastases only; age, histological subtype, surgery, and chemotherapy affected overall survival for patients with liver metastases only, while histological subtype and chemotherapy affected overall survival for patients with lung metastases only.

Conclusions: The site of distant metastases affected overall survival in metastatic ovarian cancer. Patients with specific distant metastatic sites should receive special treatment and management. The identified prognostic factors can help clinician evaluate the prognosis for ovarian cancer patients with distant metastases.
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http://dx.doi.org/10.1016/j.ygyno.2018.06.022DOI Listing
September 2018

Plasmon Ag decorated 3D urchinlike N-TiO for enhanced visible-light-driven photocatalytic performance.

J Colloid Interface Sci 2018 Jul 12;521:102-110. Epub 2018 Mar 12.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China. Electronic address:

Plasmon Ag decorated 3D urchinlike N-TiO photocatalysts are successfully synthesized by a facile hydrothermal treatment (180 °C) and combined with a photo-deposition approach, followed by a reduction treatment. The results show that the resultant Ag/N-TiO sample possesses a three-dimensional (3D) urchinlike nanostructure with high crystallinity of anatase. Meanwhile, it exhibits the narrow optical band gap (Eg ∼ 2.61 eV) and the excellent visible-light-driven photocatalytic performance. Moreover, the hydrogen generation rate and photocatalytic degradation rate of phenol are up to 186.2 μmol h g and 97.7% under visible light irradiation, which are about 4.2 and 5.4 folds greater than that of N-TiO. The mechanism of photocatalytic process is also proposed, and the enhanced photocatalytic property is mainly due to the synergistic reaction of the Ti and N codoping, which narrows the band gap and favors the utilization of visible light, and the plasmon effect of Ag nanoparticles and unique 3D urchinlike architecture, which are propitious to the separation and transmission of photogenerated carriers.
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http://dx.doi.org/10.1016/j.jcis.2018.03.030DOI Listing
July 2018

C,N co-doped porous TiO hollow sphere visible light photocatalysts for efficient removal of highly toxic phenolic pollutants.

Dalton Trans 2018 Apr;47(14):4877-4884

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.

Herein, C,N co-doped porous TiO2 hollow sphere visible light photocatalysts were fabricated using biocompatible N-lauroyl-l-glutamic acid as a doped precursor and soft-template by a mild and facile self-assembly soft-template method, followed by calcination at 550 °C in air. The structure, morphology, and surface elemental composition were characterized in detail by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results show that the prepared TiO2 photocatalysts have a porous hollow sphere structure and are co-doped with C and N. The visible-light-driven photocatalytic degradation rates of phenol and 2-chlorophenol are ∼92 and 90%, respectively. The photocatalytic reaction rate constants of phenol and dichlorophen on HPT550 porous TiO2 hollow spheres were about ∼4 and ∼2 times higher than those on P25, respectively. This enhancement is because the C,N co-doped porous TiO2 hollow spheres not only extend the photoresponse to the visible light region as C,N co-doping narrows the bandgap (2.7 eV), but also expose a large number of surface active sites that favor visible-light-driven photocatalysis. Moreover, the porous hollow structure favors multiple reflections of photons in the interior, increasing the utilization ratio of light. It is worth to pay more efforts to the development of visible light photocatalysts and further promote their practical application.
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http://dx.doi.org/10.1039/C8DT00262BDOI Listing
April 2018

Mesoporous black TiO/Ag nanospheres coupled with g-CN nanosheets as 3D/2D ternary heterojunctions visible light photocatalysts.

J Hazard Mater 2018 Feb 20;343:181-190. Epub 2017 Sep 20.

Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China. Electronic address:

3D mesoporous black TiO/Ag nanosphere coupled with 2D g-CN sheet ternary heterojunctions are successfully fabricated through a facile evaporation-induced self-assembly (EISA) process and photodeposition method, followed by a mild calcination (350°C) under an argon atmosphere after an in situ solid-state chemical reduction strategy. The resultant mesoporous black TiO/Ag/g-CN ternary heterojunctions with narrow band gap of∼2.27eV possess a relative high specific surface area of∼100mg, main pore size of 6.2nm and the highest visible-light-driven photocatalytic property for degradation of methyl orange (97%) and methylene blue (99%). The apparent reaction rate constants (k) of mesoporous black TiO/Ag/g-CN for methyl orange and methylene blue are∼9 and 11 times higher than that of pristine TiO. The possible mechanism is proposed, and the excellent photocatalytic property can be ascribed to the introduction of Ti self-doping and g-CN, which favor the visible light absorption and the separation of electron-hole pairs, the surface plasma resonance effect of Ag nanoparticle, and the mesoporous networks offer more surface active sites.
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http://dx.doi.org/10.1016/j.jhazmat.2017.09.031DOI Listing
February 2018
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