Publications by authors named "Hongwei Huang"

79 Publications

Synergistic Polarization Engineering on Bulk and Surface for Boosting CO2 Photoreduction.

Angew Chem Int Ed Engl 2021 May 31. Epub 2021 May 31.

China University of Geosciences Beijing, School of Materials Science and Technology, CHINA.

Sluggish charge kinetics and low CO2 affinity seriously inhibit CO2 photoreduction. Herein, the synchronous promotion of charge separation and CO2 affinity of Bi4Ti3O12 is realized by coupling corona poling and surface I-grafting. Corona poling enhances ferroelectric polarization of Bi4Ti3O12 by aligning the domains direction, which profoundly promotes charge transfer along opposite directions across bulk. Surface I-grafting forms a surface local electric field for further separating charge carriers, and provides abundant active sites to enhance CO2 adsorption. Notably, the two modifications cooperatively further increase the ferroelectric polarization of Bi4Ti3O12 , which maximize the separation efficiency of photogenerated charges, resulting in a highly-enhanced CO production rate of 15.1 µmol·g -1·h -1 (nearly 9 times) with no sacrificial agents or cocatalysts. This work discloses that ferroelectric polarization and surface ion grafting can promote CO2 photoreduction in a synergistic way.
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http://dx.doi.org/10.1002/anie.202106310DOI Listing
May 2021

Exceptional Cocatalyst-Free Photo-Enhanced Piezocatalytic Hydrogen Evolution of Carbon Nitride Nanosheets from Strong In-Plane Polarization.

Adv Mater 2021 May 8:e2101751. Epub 2021 May 8.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.

Utilizing mechanical energy to produce hydrogen is emerging as a promising way to generate renewable energy, but is challenged by low efficiency and scanty cognition. In this work, graphitic carbon nitride (g-C N ) with an atomically thin sheet-like structure is applied for prominent piezocatalytic and photo-enhanced piezocatalytic H production. It is revealed that the anomalous piezoelectricity in g-C N originates from the strong in-plane polarization along the a-axis, contributed by the superimposed polar tri-s-triazine units and flexoelectric effect derived from the structured triangular cavities, which provides powerful electrochemical driving force for the water reduction reaction. Furthermore, the photo-enhanced charge transfer enables g-C N nanosheets to reserve more energized polarization charges to fully participate in the reaction at the surface reactive sites enriched by strain-induced carbon vacancies. Without any cocatalysts, an exceptional photo-piezocatalytic H evolution rate of 12.16 mmol g h is delivered by the g-C N nanosheets, far exceeding that of previously reported piezocatalysts and g-C N photocatalysts. Further, high pure-water-splitting performance with production of the value-added oxidation product H O via photo-piezocatalysis is also disclosed. This work not only exposes the potential of g-C N as a piezo-semiconductor for catalytic H evolution, but also breaks a new ground for the conversion of solar and mechanical energy by photomediated piezocatalytic reaction.
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http://dx.doi.org/10.1002/adma.202101751DOI Listing
May 2021

Effect of storage states on stability of three organophosphorus insecticide residues on cowpea samples.

J Sci Food Agric 2021 Apr 15. Epub 2021 Apr 15.

College of Science, China Agricultural University, Beijing, China.

Background: The stability of pesticide residues in stored samples is very important to ensure the quality of data about the residues. The evaluation of pesticide residues in food and environment samples is an important means to ensure food quality and protect consumers against potential dietary risks. Improper storage of pesticide residue samples may result in loss of pesticide and unreliable data, which could affect safety assessments.

Results: The influences of storage conditions, including temperature (-20 °C, 4 °C, and ambient temperature) and sample state (homogenized state and coarsely chopped state) on the storage stability of dichlorvos, malathion, and diazinon on cowpea were studied. Dichlorvos and malathion were more stable in an homogenized state than in a coarsely chopped state. At 4 °C, the residual dichlorvos in the coarsely chopped state and the homogenized state, respectively, was 12% and 69%; the residual malathion was 26% and 92%, respectively. Dichlorvos suffered a large loss of 89% and 59% for coarsely chopped and homogenized cowpea, even at -20 °C. It was obvious that the stability of dichlorvos and malathion were more affected by storage state than diazinon. The stability of diazinon was significantly affected by temperature. The effect of storage state and temperature on stability is likely to be correlated with enzymes in the matrix, such as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD).

Conclusion: The optimal stable storage conditions for three organophosphorus insecticides residues on cowpea were in the homogenized state and under a lower temperature. © 2021 Society of Chemical Industry.
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http://dx.doi.org/10.1002/jsfa.11257DOI Listing
April 2021

Pickering emulsion-embedded hierarchical solid-liquid hydrogel spheres for static and flow photocatalysis.

J Colloid Interface Sci 2021 May 14;589:587-596. Epub 2021 Jan 14.

Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, China. Electronic address:

Pickering emulsion-based photocatalysis is considered to be a promising system due to its large active surface area and water/oil spatial separation capability for enrichment of substrates and products. In this work, a novel hierarchical structure composed of calcium alginate gel sphere wrapped ionic liquid-in-water Pickering emulsion with TiO in the water phase, which are stabilized by graphene oxide, is prepared via a facile one-step emulsion gelation method. Such subtle combination of Pickering emulsion, hydrogel and TiO with a multi-stage solid-liquid assemblage structure shows enhanced degradation activity of 2-naphthol into small molecular alkanes under simulated solar irradiation. The photodegradation activity is attributed to the ionic liquid as adsorption medium for 2-naphthol, and the high-efficient charge separation at graphene oxide/TiO interface superior to that of pure TiO. More importantly, the as-prepared millimeter-sized assembled gel spheres can be directly used as the column filler to construct continuous flow photocatalytic system, maintaining the promising performance in removing pollutants from water with ~100% remove ability of 2-naphthol on stream. A charge transfer mechanism of the photocatalyst is proposed, i.e. photogenerated charges are separated in TiO/graphene oxide p-n heterostructure at the interface of Pickering emulsion droplets.
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http://dx.doi.org/10.1016/j.jcis.2021.01.020DOI Listing
May 2021

Atomic-Level Charge Separation Strategies in Semiconductor-Based Photocatalysts.

Adv Mater 2021 Mar 27;33(10):e2005256. Epub 2021 Jan 27.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.

Semiconductor-based photocatalysis as a productive technology furnishes a prospective solution to environmental and renewable energy issues, but its efficiency greatly relies on the effective bulk and surface separation of photoexcited charge carriers. Exploitation of atomic-level strategies allows in-depth understanding on the related mechanisms and enables bottom-up precise design of photocatalysts, significantly enhancing photocatalytic activity. Herein, the advances on atomic-level charge separation strategies toward developing robust photocatalysts are highlighted, elucidating the fundamentals of charge separation and transfer processes and advanced probing techniques. The atomic-level bulk charge separation strategies, embodied by regulation of charge movement pathway and migration dynamic, boil down to shortening the charge diffusion distance to the atomic-scale, establishing atomic-level charge transfer channels, and enhancing the charge separation driving force. Meanwhile, regulating the in-plane surface structure and spatial surface structure are summarized as atomic-level surface charge separation strategies. Moreover, collaborative strategies for simultaneous manipulation of bulk and surface photocharges are also introduced. Finally, the existing challenges and future prospects for fabrication of state-of-the-art photocatalysts are discussed on the basis of a thorough comprehension of atomic-level charge separation strategies.
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http://dx.doi.org/10.1002/adma.202005256DOI Listing
March 2021

Photocatalytic Oxygen Evolution from Water Splitting.

Adv Sci (Weinh) 2020 Jan 18;8(1):2002458. Epub 2020 Nov 18.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing 100083 China.

Photocatalytic water splitting has attracted a lot of attention in recent years, and O evolution is the decisive step owing to the complex four-electrons reaction process. Though many studies have been conducted, it is necessary to systematically summarize and introduce the research on photocatalytic O evolution, and thus a systematic review is needed. First, the corresponding principles about O evolution and some urgently encountered issues based on the fundamentals of photocatalytic water splitting are introduced. Then, several types of classical water oxidation photocatalysts, including TiO, BiVO, WO, -FeO, and some newly developed ones, such as Sillén-Aurivillius perovskites, porphyrins, metal-organic frameworks, etc., are highlighted in detail, in terms of their crystal structures, synthetic approaches, and morphologies. Third, diverse strategies for O evolution activity improvement via enhancing photoabsorption and charge separation are presented, including the cocatalysts loading, heterojunction construction, doping and vacancy formation, and other strategies. Finally, the key challenges and future prospects with regard to photocatalytic O evolution are proposed. The purpose of this review is to provide a timely summary and guideline for the future research works for O evolution.
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http://dx.doi.org/10.1002/advs.202002458DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7788637PMC
January 2020

Leukemoid reaction with severe thrombocytopenia in a dying patient: a case report and literature review.

Authors:
Huang Hongwei

J Int Med Res 2021 Jan;49(1):300060520974257

Intensive Care Unit, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China.

Leukemoid reaction complicated by thrombocytopenia is rare, usually seen in patients with malignant conditions, and is often associated with poor prognosis. Here, the case of a 28-year-old healthy female without exceptional past medical history, who suffered from severe vaginal infection, is reported. Although symptoms improved, the white blood cell (WBC) count continued to increase up to 78 460 cells/µl, however, the patient continued to improve and the outcome was good. The case revealed that an increasing WBC count may not change in synchrony with clinical symptoms. When faced with this scenario, procalcitonin measurements may play an important role in differentiating diagnosis and guiding treatment.
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http://dx.doi.org/10.1177/0300060520974257DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7804355PMC
January 2021

Heavy metal pollution, ecological risk, spatial distribution, and source identification in sediments of the Lijiang River, China.

Environ Pollut 2021 Jan 30;269:116189. Epub 2020 Nov 30.

College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, PR China.

The Lijiang River is of great ecological and environmental importance for Guilin City, which is located in the karst area of southeast China. Given its importance, a detailed evaluation of the heavy metals (HMs) in the river sediment is required. For the first time, 61 sediment samples were collected along the entire Lijiang River to determine pollution level and ecological risk posed by 10 HMs (Co, Cr, Cu, Mn, Ni, Pb, Zn, As, Hg, and Cd). These were assessed using the geo-accumulation index, potential ecological risk index, and modified degree of contamination. The results showed that the mean concentrations of the majority of HMs exceeded their corresponding background values and followed the trend: midstream > downstream > upstream. Based on the spatial distributions and pollution indices of the 10 HMs, the Lijiang River was found to have a high accumulation of Cd, Hg, Zn, and Pb in the sediments. The midstream area was the most polluted with respect to Cd and Hg, and also posed a relatively higher potential ecological risk than the downstream and upstream areas. The sources of the assessed HMs were inferred based on a correlation analysis and principal component analysis, which identified both natural and anthropogenic sources. A higher pollution potential was associated with Cd, Hg, Pb, and Zn in the midstream and downstream areas due to higher organic and carbonate content, urbanization, agricultural activities, and leisure activities (e.g., boating and cruises). In contrast, natural erosion and weathering processes were responsible for the HM concentrations in the upstream area. The findings of this study will help the local authorities to protect the important water resource of the Lijiang River.
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http://dx.doi.org/10.1016/j.envpol.2020.116189DOI Listing
January 2021

Photocatalysis-Assisted CoO/g-CN p-n Junction All-Solid-State Supercapacitors: A Bridge between Energy Storage and Photocatalysis.

Adv Sci (Weinh) 2020 Nov 1;7(22):2001939. Epub 2020 Oct 1.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing 100083 P. R. China.

Supercapacitors with the advantages of high power density and fast discharging rate have full applications in energy storage. However, the low energy density restricts their development. Conventional methods for improving energy density are mainly confined to doping atoms and hybridizing with other active materials. Herein, a CoO/g-CN p-n junction with excellent capacity is developed and its application in an all-solid-state flexible device is demonstrated, whose capacity and energy density are considerably enhanced by simulated solar light irradiation. Under photoirradiation, the capacity is increased by 70.6% at the maximum current density of 26.6 mA cm and a power density of 16.0 kW kg. The energy density is enhanced from 7.5 to 12.9 Wh kg with photoirradiation. The maximum energy density reaches 16.4 Wh kg at a power density of 6.4 kW kg. It is uncovered that the lattice distortion of CoO, reduces defects of g-CN, and the facilitated photo-generated charge separation by the CoO/g-CN p-n junction all make contributions to the promoted electrochemical storage performance. This work may provide a new strategy to enhance the energy density of supercapacitors and expand the application range of photocatalytic materials.
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http://dx.doi.org/10.1002/advs.202001939DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7675041PMC
November 2020

Towards Automated 3D Inspection of Water Leakages in Shield Tunnel Linings Using Mobile Laser Scanning Data.

Sensors (Basel) 2020 Nov 21;20(22). Epub 2020 Nov 21.

Key Laboratory of Geotechnical and Underground Engineering, Department of Geotechnical Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China.

On-site manual inspection of metro tunnel leakages has been faced with the problems of low efficiency and poor accuracy. An automated, high-precision, and robust water leakage inspection method is vital to improve the manual approach. Existing approaches cannot provide the leakage location due to the lack of spatial information. Therefore, an integrated deep learning method of water leakage inspection using tunnel lining point cloud data from mobile laser scanning is presented in this paper. It is composed of three parts as follows: (1) establishment of the water leakage dataset using the acquired point clouds of tunnel linings; (2) automated leakage detection via a mask-region-based convolutional neural network; and (3) visualization and quantitative evaluation of the water leakage in 3D space via a novel triangle mesh method. The testing result reveals that the proposed method achieves automated detection and evaluation of tunnel lining water leakages in 3D space, which provides the inspectors with an intuitive overall 3D view of the detected water leakages and the leakage information (area, location, lining segments, etc.).
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http://dx.doi.org/10.3390/s20226669DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7700199PMC
November 2020

Effect of Methionine on Gene Expression in Prostate Cancer Cells.

Nutr Cancer 2020 Oct 15:1-12. Epub 2020 Oct 15.

Health Management Center, The Second Affiliate Hospital of Nanchang University, Nanchang, Jiangxi, China.

Objective: To investigate the effect of gene expression on prostate cancer cells (PC-3M), explore the mechanism of AMD1 action in cancer cells, and examine the regulation of gene expression by methionine (MET).

Methods: Quantitative PCR (qPCR) and western blot analysis (WB) approaches were used to detect and measure gene expression. The cell apoptotic rate was determined by flow cytometric (FCM) analysis.

Results: qPCR and WB assays showed that both gene expression and cell apoptotic rate were associated with MET.

Conclusion: MET has a significant regulatory effect on the expression of the gene and a certain amount of MET can promote the expression of the gene. This provides a health guideline for a low-methionine diet for prostate cancer patients and scientific evidence for prostate cancer prevention.
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http://dx.doi.org/10.1080/01635581.2020.1803931DOI Listing
October 2020

Identification of Halogen-Associated Active Sites on Bismuth-Based Perovskite Quantum Dots for Efficient and Selective CO-to-CO Photoreduction.

ACS Nano 2020 Oct 23;14(10):13103-13114. Epub 2020 Sep 23.

Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.

All-inorganic Pb-free bismuth (Bi) halogen perovskite quantum dots (PQDs) with distinct structural and photoelectric properties provide plenty of room for selective photoreduction of CO. However, the efficient conversion of CO-to-CO with high selectivity on Bi-based PQDs driven by solar light remains unachieved, and the precise reaction path/mechanism promoted by the surface halogen-associated active sites is still poorly understood. Herein, we screen a series of nontoxic and stable CsBiX (X = Cl, Br, I) PQDs for selective photocatalytic reduction of CO-to-CO at the gas-solid interface. Among all the reported pure-phase PQDs, the as-synthesized CsBiBr PQDs exhibited the highest CO-to-CO conversion efficiency generating 134.76 μmol g of CO yield with 98.7% selectivity under AM 1.5G simulated solar illumination. The surface halogen-associated active sites and reaction intermediates were dynamically monitored and precisely unraveled based on DRIFTS investigation. In combination with the DFT calculation, it was revealed that the surface Br sites allow for optimizing the coordination modes of surface-bound intermediate species and reducing the reaction energy of the rate-limiting step of COOH intermediate formation from CO. This work presents a mechanistic insight into the halogen-involved catalytic reaction mechanism in solar fuel production.
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http://dx.doi.org/10.1021/acsnano.0c04659DOI Listing
October 2020

Surface engineered 2D materials for photocatalysis.

Chem Commun (Camb) 2020 Sep;56(75):11000-11013

Discipline of Chemistry, School of Environmental & Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia.

Benefitting from their unique structure and physicochemical properties, two-dimensional (2D) materials have aroused tremendous interest from academia and industry, being regarded as an important class of photocatalysts. However, their photocatalytic activities still need further improvement to satisfy the requirement of scale-up production. In this regard, the surface engineering strategy is considered as one of the most effective methods for optimizing their photocatalytic performance. This feature article not only classifies the 2D photocatalysts into layered and non-layered 2D photocatalysts and presents their preferred synthesis methods, but also summarizes the advantages of the surface engineering strategy for boosting the photocatalytic performance of 2D materials from the aspects of light absorption, charge carrier separation and surface active sites. Various surface engineering strategies, such as surface decorating, vacancy engineering, element doping, surface heterojunction construction and regulation of facet-dependent sites, have also been presented as advantages of the surface engineering strategy. Eventually, the challenges and future outlook for optimizing the photocatalytic activities of 2D materials through surface engineering are addressed.
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http://dx.doi.org/10.1039/d0cc04790bDOI Listing
September 2020

Photocatalysis Enhanced by External Fields.

Angew Chem Int Ed Engl 2020 Aug 7. Epub 2020 Aug 7.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, P. R. China.

The efficient conversion of solar energy by means of photocatalysis shows huge potential to relieve the ongoing energy crisis and increasing environmental pollution. However, unsatisfactory conversion efficiency still hinders its practical application. The introduction of external fields can remarkably enhance the photocatalytic performance of semiconductors from the inside out. This review focuses on recent advances in the application of diverse external fields, including microwaves, mechanical stress, temperature gradient, electric field, magnetic field, and coupled fields, to boost photocatalytic reactions, for applications in, for example, contaminant degradation, water splitting, CO reduction, and bacterial inactivation. The relevant reinforcement mechanisms of photoabsorption, the transport and separation of photoinduced charges, and adsorption of reagents by the external fields are highlighted. Finally, the challenges and outlook for the development of external-field-enhanced photocatalysis are presented.
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http://dx.doi.org/10.1002/anie.202009518DOI Listing
August 2020

Enhancing H evolution and molecular oxygen activation via dye sensitized BiOBrI under visible light.

J Colloid Interface Sci 2020 Nov 8;580:1-10. Epub 2020 Jul 8.

School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China. Electronic address:

Sensitization with a dye has great potential for dealing with the photoexcited charge recombination problem for photocatalysts. One of the main factors affecting the dye-sensitization performance is the absorption capacity of semiconductor for dye. Specific surface area of semiconductors and pH values of reaction system are critical for the absorption capacity. Herein, we firstly developed a BiOBrI solid solution via a facile and fast sacrificial template method. The prepared BiOBrI has distinct advantages, e.g. loose and rich porous structure, more oxygen vacancies (OVs), and a large specific surface area, which result in strong adsorption for dye molecules. Sensitized by Rhodamine B (RhB), the prepared BiOBrI photocatalyst shows remarkably improved high activity for H evolution, which is 27.9 times than that of the dense structured BiOBrI under a direct photocatalytic process. By lowing the pH of RhB solution, the absorption ability is further improved because of the protonation of dye. At low pH, the prepared BiOBrI can efficiently activate the molecular oxygen to produce superoxide radicals (O), resulting a super high dye-sensitized degradation activity for tetracycline hydrochloride (TCH) and methyl orange (MO) pollutants, outperforming most catalysts reported under similar conditions by the direct photocatalytic reaction. The present method represents a new direction in the development of dye-sensitization nanomaterials with good performance for energy and environment applications.
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http://dx.doi.org/10.1016/j.jcis.2020.07.014DOI Listing
November 2020

Residue behavior and removal of iprodione in garlic, green garlic, and garlic shoot.

J Sci Food Agric 2020 Oct 29;100(13):4705-4713. Epub 2020 Jun 29.

College of Science, China Agricultural University, Beijing, China.

Background: Iprodione is considered to be an endocrine-disturbing pesticide, which could harm consumers. The garlic crop has three edible parts: the garlic, the green garlic, and the garlic shoot, which correspond to different stages of its growth. In this study, iprodione residue dissipation and distribution in these three edible parts were investigated, and dietary risk was evaluated.

Results: Iprodione residues were present in these samples in the following order: green garlic > garlic shoot > > garlic. The dissipation of iprodione in green garlic was slow with a half-life of 5.82-19.25 days. A very high RQ value of 207.35-407.30% suggested that the residual iprodione in green garlic had an unacceptable level of risk. Iprodione residue was significantly eliminated (59-90%) by an alkaline solution. The order for removing iprodione by soaking was the alkaline solutions (0.5% and 2% NaHCO ) > the acidic solutions (5% and 10% of vinegar) ≈ the neutral solutions (the 1% and 2% of table salt) > tap water. Processing factors (PFs) were <1, indicating that processing could decrease the iprodione residue level.

Conclusion: This work could contribute to establishing maximum residue limits (MRLs) for iprodione in garlic, green garlic, and garlic shoots, and could provide guidance on the safe and appropriate use of iprodione in the garlic crop. © 2020 Society of Chemical Industry.
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http://dx.doi.org/10.1002/jsfa.10527DOI Listing
October 2020

Construction of PDDA functionalized black phosphorus nanosheets/BiOI Z-scheme photocatalyst with enhanced visible light photocatalytic activity.

J Colloid Interface Sci 2020 Sep 27;576:34-46. Epub 2020 Apr 27.

School of Resources and Environmental Engineering, Shandong University of Technology, 255049 Zibo, PR China. Electronic address:

The use of black phosphorus (BP) nanosheets has attracted much attention in the area of photocatalysis owing to the thickness-tunable bandgap and high carrier mobility. In order to improve the stability of BP nanosheets, poly dimethyldiallyl ammonium chloride (PDDA) is used to passivate the BP nanosheets and change its surface properties. The present study concerns the development of a facile electrostatic assembly method for the construction of a Z-scheme system consisting of PDDA-functionalized BP nanosheets and layered BiOI in order to enhance visible light adsorption and promote electron-hole separation. The morphology, structure and photoelectrochemical properties of the composites are thoroughly characterized and the photocatalytic performances of all the samples were assessed under visible light irradiation. The 5-F-BP/BiOI exhibits excellent photocatalytic activity with removal efficiencies of 97.6% and 90.0% for methylene blue (MB) and tetracycline (TC), respectively. Superoxide radicals (·O) were found to be the main organic decomposition products according to species trapping experiments. The photocatalyst presents favorable stability after three catalytic cycles. This study provides new insights into the design of highly efficient Z-scheme photocatalysts based on functionalized BP nanosheets in order to meet environmental demands.
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http://dx.doi.org/10.1016/j.jcis.2020.04.103DOI Listing
September 2020

Theoretical and Experimental Studies on the Signal Propagation in Soil for Wireless Underground Sensor Networks.

Sensors (Basel) 2020 May 1;20(9). Epub 2020 May 1.

Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China.

Wireless Underground Sensor Networks (WUSNs), an important part of Internet of things (IoT), have many promising applications in various scenarios. Signal transmission in natural soil undergoes path loss due to absorption, radiation, reflection and scattering. The variability and dynamic of soil conditions and complexity of signal attenuation behavior make the accurate estimation of signal path loss challenging. Two existing propagation models for predicting path loss are reviewed and compared. Friis model does not consider the reflection loss and is only applicable in the far field region. The Fresnel model, only applicable in the near field region, has not considered the radiating loss and wavelength change loss. A new two stage model is proposed based on the field characteristics of antenna and considers four sources of path loss. The two stage model has a different coefficient in the near field and far field regions. The far field distance of small size antenna is determined by three criteria: 2 /λ, 5 , 1.6 in the proposed model. The proposed two stage model has a better agreement with the field experiment data compared to Friis and Fresnel models. The coefficient is dependent on the soil types for the proposed model in near field region. It is observed from experiment data that the value is in the range of 0~0.20 for sandy soils and 0.433~0.837 for clayey silt.
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http://dx.doi.org/10.3390/s20092580DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7248894PMC
May 2020

Z-scheme g-CN/BiO[BO(OH)] heterojunction for enhanced photocatalytic CO reduction.

J Colloid Interface Sci 2020 May 11;568:139-147. Epub 2020 Feb 11.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.

Construction of Z-scheme heterojunction photocatalyst for CO photoreduction shows great significance as it holds strong redox ability and high charge separation efficiency. In this work, we developed a Z-scheme heterojunction photocatalyst graphitic carbon nitride (g-CN)/basic bismuth borate (BiO[BO(OH)]) by a simple high-energy ball milling method. The structure, surface element distribution and morphology of the composite samples were systematically analyzed. The photocatalytic performance of the samples was surveyed by CO reduction experiment under the simulated solar light irradiation. Almost all the g-CN/BiO[BO(OH)] composites show enhanced photocatalytic activity for converting CO into CO, and the highest CO production rate observed for g-CN/BiO[BO(OH)] (CNBB-3) among all the samples was determined to be approximately 6.09 µmol g h, which is 2.78 times higher that of pristine g-CN. The largely strengthened photocatalytic CO reduction activity mainly originates from the formation of Z-scheme band structures between g-CN and BiO[BO(OH)] benefiting for the efficient charge separation, which was confirmed by the photoeletrochemical, photoluminescence and ESR spectra. This study provides a new reference for fabrication of high-performance Z-scheme photocatalysts for CO reduction.
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http://dx.doi.org/10.1016/j.jcis.2020.02.025DOI Listing
May 2020

Macroscopic Spontaneous Polarization and Surface Oxygen Vacancies Collaboratively Boosting CO Photoreduction on BiOIO Single Crystals.

Adv Mater 2020 Mar 6;32(11):e1908350. Epub 2020 Feb 6.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Mineralsand Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.

Prompt recombination of photogenerated electrons and holes in bulk and on the surface of photocatalysts harshly impedes the photocatalytic efficiency. However, the simultaneous manipulation of photocharges in the two locations is challenging. Herein, the synchronous promotion of bulk and surface separation of photoinduced charges for prominent CO photoreduction by coupling macroscopic spontaneous polarization and surface oxygen vacancies (OVs) of BiOIO single crystals is reported. The oriented growth of BiOIO single-crystal nanostrips along the [001] direction, ensuing substantial well-aligned IO polar units, renders a large enhancement for the macroscopic polarization electric field, which is capable of driving the rapid separation and migration of charges from bulk to surface. Meanwhile the introduction of surface OVs establishes a local electric field for charge migration to catalytic sites on the surface of BiOIO nanostrips. Highly polarized BiOIO nanostrips with ample OVs demonstrate outstanding CO reduction activity for CO production with a rate of 17.33 µmol g h (approximately ten times enhancement) without any sacrificial agents or cocatalysts, being one of the best CO reduction photocatalysts in the gas-solid system reported so far. This work provides an integrated solution to governing charge movement behavior on the basis of collaborative polarization from bulk and surface.
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http://dx.doi.org/10.1002/adma.201908350DOI Listing
March 2020

TMSB10 promotes migration and invasion of cancer cells and is a novel prognostic marker for renal cell carcinoma.

Int J Clin Exp Pathol 2019 1;12(1):305-312. Epub 2019 Jan 1.

Department of Urology, The Second Affiliated Hospital of Nanchang University Nanchang, Jiangxi Province, People's Republic of China.

Objective: The study aims to examine the effect of thymosin β10 (TMSB10) on renal cell carcinoma (RCC) progression and metastasis.

Methods: Real-time PCR and immunohistochemistry analysis were used to evaluate TMSB10 expression in RCC tissue samples and renal cancer cells. Statistical analyses were applied to investigate the association between TMSB10 expression and the clinicopathological characteristics and prognosis of RCC patients. In vitro migration and invasion assays were performed in 786-O and ACHN cells.

Results: The expression of TMSB10 was significantly higher in renal cancer cells and tissues compared with normal kidney cells and tissues. TMSB10 expression was significantly related to tumor stage (P=0.002), lymph node metastasis (P=0.034), and distant metastasis (P=0.039). Kaplan-Meier analysis suggested that high TMSB10 expression was significantly associated with unfavorable overall (P=0.004) and recurrent-free survival (P=0.025) of RCC patients. Furthermore, TMSB10 knockdown inhibited the migration and invasion abilities of renal cancer cells in vitro.

Conclusion: TMSB10 is overexpressed in RCC and regulates malignant cell metastasis by inducing epithelial-mesenchymal transition, which makes TMSB10 a candidate therapeutic target for RCC.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6944031PMC
January 2019

Clinical analysis of adrenal lesions larger than 5 cm in diameter (an analysis of 251 cases).

World J Surg Oncol 2019 Dec 16;17(1):220. Epub 2019 Dec 16.

Department of Urology, The First Affiliated Hospital of Dalian Medical University, Dalian, China.

Background: To describe the pathological distribution, imaging manifestations, and surgical managements and prognosis of large adrenal tumors (LATs) ≥ 5 cm METHODS: A total of 251 patients with LATs were analyzed on the basis of pathological or clinical diagnosis. Regarding surgery, open adrenalectomy was performed on 89 patients, and laparoscopic adrenalectomy was performed on 89 patients. Thirty-two patients with bilateral tumors were analyzed in terms of clinical characteristics. The survival rate was determined for 43 patients with adrenal metastases and 29 patients with primary adrenal malignancies. The CT characteristics including tumor diameter, shape, edge, heterogeneity, necrosis, calcification, pre-contrast attenuation, and contrast attenuation were analyzed for 117 patients.

Results: The majority of LATs were still benign, but they had a higher probability to be malignant. Benign LATs made up 68.13% of all cases, mainly adrenal cysts (19.52%), pheochromocytoma (18.73%), benign adenoma (16.73%), and myelolipoma (7.17%). Malignant LATs accounted for 28.69% of cases, mainly including adrenocortical carcinoma (8.76%) and metastases (17.13%). Laparoscopic surgery was found to involve less trauma than open surgery. It was also safer and postoperative recovery was faster, but it had drawbacks and could not completely replace open surgery. CT features had obvious specificity for the diagnosis of benign and malignant tumors. For example, benign adenomas had a smaller pre-contrast (< 10 Hu) whereas malignant adrenal tumors had, on the contrary, higher attenuation. Regarding adrenal malignant carcinoma, adrenal primary malignant tumors showed a better prognosis than adrenal metastases (mean survival of 19.17 months vs 9.49 months). Primary adrenal cortical carcinoma without metastasis had a better prognosis than primary adrenal cortical carcinoma metastasis (mean survival of 23.71 months vs 12.75 months), and adrenal solitary metastasis had a better prognosis than general multiple metastatic carcinoma (mean survival of 14.95 months vs 5.17 months).

Conclusion: LATs were more likely to be benign; however, they still had a high probability of being a malignant tumor. Understanding the clinicopathological characteristics of LATs can facilitate selection of more effective clinical treatment options.
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http://dx.doi.org/10.1186/s12957-019-1765-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6916431PMC
December 2019

BiNbOCl {001} nanosheets coupled with g-CN as 2D/2D heterojunction for photocatalytic degradation and CO reduction.

J Hazard Mater 2020 01 4;381:121159. Epub 2019 Sep 4.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.

Photocatalytic activity is largely restricted by insufficient photoabsorption and intense recombination between charge carriers. Here, we first synthesized BiNbOCl nanosheets with {001} exposing facets by a molten-salt growth method, which shows largely promoted photocatalytic performance for the degradation of tetracycline (TC) and bisphenol A (BPA) in comparison with BiNbOCl particles obtained by solid-state reaction. The 2D/2D BiNbOCl/g-CN heterojunction photocatalysts were then fabricated via high-energy ball-milling and post-sintering to realize intimate interfacial interaction. The photocatalytic activity of all the BiNbOCl/g-CN composites largely enhances compared to BiNbOCl nanosheets and g-CN, also far exceeding the mechanically-mixed BiNbOCl nanosheets and g-CN. The impact of different reaction parameters on the photocatalytic degradation activities was investigated, including catalyst concentration, pH value and TC concentration. In addition, BiNbOCl/g-CN also presents improved photocatalytic CO reduction activity for CO production. The large enhancement on photocatalytic activity of BiNbOCl/g-CN composites is owing to the synergistic effect of favorable 2D/2D structure and construction of type II heterojunction with intimate interfacial interaction, thus boosting the charge separation. The formation of type II heterojunction was evidenced by selective photo-deposition of Pt and MnO, which demonstrate that the reductive sites and oxidative sites are on BiNbOCl nanosheets and g-CN, respectively. This work may provide some insights into fabrication of efficient visible-light driven photocatalysts for environmental and energy applications.
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http://dx.doi.org/10.1016/j.jhazmat.2019.121159DOI Listing
January 2020

Impact of Water Level Rise on Urban Infrastructures: Washington, DC, and Shanghai as Case Studies.

Risk Anal 2019 12 23;39(12):2718-2731. Epub 2019 Aug 23.

Department of Civil and Environmental Engineering, Center for Technology and Systems Management, University of Maryland, College Park, MD, USA.

The observed global sea level rise owing to climate change, coupled with the potential increase in extreme storms, requires a reexamination of existing infrastructural planning, construction, and management practices. Storm surge shows the effects of rising sea levels. The recent super storms that hit the United States (e.g., Hurricane Katrina in 2005, Sandy in 2012, Harvey and Maria in 2017) and China (e.g., Typhoon Haiyan in 2010) inflicted serious loss of life and property. Water level rise (WLR) of local coastal areas is a combination of sea level rise, storm surge, precipitation, and local land subsidence. Quantitative assessments of the impact of WLR include scenario identification, consequence assessment, vulnerability and flooding assessment, and risk management using inventory of assets from coastal areas, particularly population centers, to manage flooding risk and to enhance infrastructure resilience of coastal cities. This article discusses the impact of WLR on urban infrastructures with case studies of Washington, DC, and Shanghai. Based on the flooding risk analysis under possible scenarios, the property loss for Washington, DC, was evaluated, and the impact on the metro system of Shanghai was examined.
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http://dx.doi.org/10.1111/risa.13390DOI Listing
December 2019

Unprecedented Eighteen-Faceted BiOCl with a Ternary Facet Junction Boosting Cascade Charge Flow and Photo-redox.

Angew Chem Int Ed Engl 2019 Jul 5;58(28):9517-9521. Epub 2019 Jun 5.

Beijing Key Laboratory of Materials Utilization of Nonmetallic minerals and Solid Wastes, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, P. R. China.

Exposure of anisotropic crystal facets allows the directional transfer of photoexcited electrons (e ) and holes (h ), for spatial charge separation. High-index facets with a high density of low-coordinated atoms always serve as reactive catalytic sites. However, preparation of multi-facets or high-index facets is highly challenging for layered bismuth-based photocatalysts. Herein, we report the preparation of unprecedented eighteen-faceted BiOCl with {001} top facets and {102} and {112} oblique facets via a hydrothermal process. Compared to the conventional BiOCl square plates with {001} top facets and {110} lateral facets, the eighteen-faceted BiOCl has highly enhanced photocatalytic activity for H evolution and hydroxyl radicals ( OH) production. Theoretical calculations and photodeposition results disclose that the of eighteen-faceted BiOCl has a well-matched {001}/{102}/{112} ternary facet junction, which provides a cascade path for more efficient charge flow than the binary facet junction in BiOCl square plates.
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http://dx.doi.org/10.1002/anie.201904921DOI Listing
July 2019

Surface-Halogenation-Induced Atomic-Site Activation and Local Charge Separation for Superb CO Photoreduction.

Adv Mater 2019 Jun 6;31(25):e1900546. Epub 2019 May 6.

Discipline of Chemistry, School of Environmental and Life Sciences, The University of Newcastle (UON), Callaghan, NSW, 2308, Australia.

Solar-energy-driven CO conversion into value-added chemical fuels holds great potential in renewable energy generation. However, the rapid recombination of charge carriers and deficient reactive sites, as two major obstacles, severely hampers the photocatalytic CO reduction activity. Herein, a desirable surface halogenation strategy to address the aforementioned concerns over a Sillén-related layer-structured photocatalyst Bi O (OH)(NO ) (BON) is demonstrated. The surface halogen ions that are anchored on the Bi atoms by replacing surface hydroxyls on the one hand facilitate the local charge separation, and, on the other hand, activate the hydroxyls that profoundly boost the adsorption of CO molecules and protons and facilitate the CO conversion process, as evidenced by experimental and theoretical results collectively. Among the three series of BON-X (X = Cl, Br, and I) catalysts, BON-Br shows the most substantially enhanced CO production rate (8.12 µmol g h ) without any sacrificial agents or cocatalysts, ≈73 times higher than that of pristine Bi O (OH)(NO ), also exceeding that of the state-of-the-art photocatalysts reported to date. This work presents a surface polarization protocol for engineering charge behavior and reactive sites to promote photocatalysis, which shows great promise to the future design of high-performance materials for clean energy production.
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http://dx.doi.org/10.1002/adma.201900546DOI Listing
June 2019

Simplified algorithm for reliability sensitivity analysis of structures: A spreadsheet implementation.

PLoS One 2019 8;14(3):e0213199. Epub 2019 Mar 8.

Department of Geotechnical Engineering, Tongji University, Shanghai, China.

An important segment of the reliability-based optimization problems is to get access to the sensitivity derivatives. However, since the failure probability is not a closed-form function of the input variables, the derivatives are not explicitly computable and rather require a full reliability analysis which is computationally expensive. In this paper, a step-by-step algorithm has been presented to calculate the derivatives of the probability of failure and safety index with respect to the input parameters based on the advanced first-order second-moment (AFOSM) reliability method. The proposed algorithm is then implemented in a spreadsheet using Visual Basic for Application (VBA) programming language. Two geotechnical and structural examples are then presented to examine the program and describe the modeling procedure. The robustness of the proposed method is examined using a Gaussian random perturbation. The capability of the proposed method in the calculation of the sensitivity derivatives of the model uncertainty is explained in a separate section. Finally, the proposed model has been compared to the forward finite difference (FFD) method and the results are validated.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0213199PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6407918PMC
December 2019

The Role of Polarization in Photocatalysis.

Angew Chem Int Ed Engl 2019 Jul 30;58(30):10061-10073. Epub 2019 Apr 30.

Discipline of Chemistry, The University of Newcastle, Callaghan, NSW, 2308, Australia.

Semiconductor photocatalysis as a desirable technology shows great potential in environmental remediation and renewable energy generation, but its efficiency is severely restricted by the rapid recombination of charge carriers in the bulk phase and on the surface of photocatalysts. Polarization has emerged as one of the most effective strategies for addressing the above-mentioned issues, thus effectively promoting photocatalysis. This review summarizes the recent advances on improvements of photocatalytic activity by polarization-promoted bulk and surface charge separation. Highlighted is the recent progress in charge separation advanced by different types of polarization, such as macroscopic polarization, piezoelectric polarization, ferroelectric polarization, and surface polarization, and the related mechanisms. Finally, the strategies and challenges for polarization enhancement to further enhance charge separation and photocatalysis are discussed.
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http://dx.doi.org/10.1002/anie.201901361DOI Listing
July 2019

Three-in-One Oxygen Vacancies: Whole Visible-Spectrum Absorption, Efficient Charge Separation, and Surface Site Activation for Robust CO Photoreduction.

Angew Chem Int Ed Engl 2019 Mar 29;58(12):3880-3884. Epub 2019 Jan 29.

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.

A facile and controllable in situ reduction strategy is used to create surface oxygen vacancies (OVs) on Aurivillius-phase Sr Bi Nb TiO nanosheets, which were prepared by a mineralizer-assisted soft-chemical method. Introduction of OVs on the surface of Sr Bi Nb TiO extends photoresponse to cover the whole visible region and also tremendously promotes separation of photoinduced charge carriers. Adsorption and activation of CO molecules on the surface of the catalyst are greatly enhanced. In the gas-solid reaction system without co-catalysts or sacrificial agents, OVs-abundant Sr Bi Nb TiO nanosheets show outstanding CO photoreduction activity, producing CO with a rate of 17.11 μmol g  h , about 58 times higher than that of the bulk counterpart, surpassing most previously reported state-of-the-art photocatalysts. Our study provides a three-in-one integrated solution to advance the performance of photocatalysts for solar-energy conversion and generation of renewable energy.
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http://dx.doi.org/10.1002/anie.201813967DOI Listing
March 2019

miR-27a in serum acts as biomarker for prostate cancer detection and promotes cell proliferation by targeting Sprouty2.

Oncol Lett 2018 Oct 7;16(4):5291-5298. Epub 2018 Aug 7.

Department of Urology Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330001, P.R. China.

Prostate cancer (PCa) exhibits a high incidence among men, but there is no effective and non-invasive biomarker for the diagnosis of PCa, and the pathogenesis of PCa remains unclear. The present study identified that miR-27a was significantly overexpressed in the tumor tissues and sera of patients with PCa. In addition, high serum levels of miR-27a were correlated with poor survival in patients with PCa. Receiver-operating characteristic curves analysis demonstrated that the serum levels of miR-27a exhibited a high area under the curve value. Furthermore, miR-27a mimics or inhibitors significantly promoted or repressed the proliferation of PCa cells, respectively. In addition, it was identified that the expression of Sprouty2 (SPRY2) was inversely correlated with the expression of miR-27a in PCa tissues. The knockdown or overexpression of SPRY2 promoted or suppressed the proliferation of PCa cells, respectively, and the overexpression of SPRY2 inhibited the increased proliferation and cell cycle distribution of PCa cells mediated by miR-27a mimics. Taken together, these data indicated that the serum levels of miR-27a may be a novel and non-invasive biomarker for the diagnosis and prognosis of patients with PCa, and miR-27a/SPRY2 may be a therapeutic target for the treatment of PCa.
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http://dx.doi.org/10.3892/ol.2018.9274DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6144816PMC
October 2018