1,232 results match your criteria China Petroleum Processing & Petrochemical Technology[Journal]


Peptide-mediated porphyrin based hierarchical complexes for light-to-chemical conversion.

Nanoscale 2020 Jul 8. Epub 2020 Jul 8.

State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum, Qingdao 266580, China.

We present a new strategy for the biomimetic preparation of integrated photoactive complexes consisting of light harvesting and electron separation/transfer components via the hierarchical assembly of porphyrin and platinum nanoparticles on the surface of short-peptide self-assembled structures. The complexes can catalyze the conversion of visible light energy into chemical energy in the absence of an electron mediator and store it as nicotinamide adenine dinucleotide (NADH). This provides a promising step towards artificial photosystems through precisely controlled interactions of light-capturing agents, electron separators and biomolecules. Read More

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http://dx.doi.org/10.1039/d0nr03124kDOI Listing

Why synthetic virus-like nanoparticles can achieve higher cellular uptake efficiency?

Nanoscale 2020 Jul 8. Epub 2020 Jul 8.

School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China. and Institute of Advanced Materials, China University of Petroleum (East China), Qingdao 266580, Shandong, China.

Experimental studies in recent years have demonstrated that the cellular uptake properties of nanoparticles can be improved by mimicking the spiky surfaces of viruses; however, little is known on how the surface topological structure of nanoparticles affects their translocation across the cell membrane. Here, by employing dissipative particle dynamics simulations, the interactions between virus-like nanoparticles (VLPs) and the lipid bilayer are investigated. The analysis of critical force for penetration demonstrates that VLPs with relatively longer and sparser spikes have better penetrability. Read More

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http://dx.doi.org/10.1039/d0nr03234dDOI Listing

The Influence of Pore Structure and Acidity on the Hydrodesulfurization of Dibenzothiophene over NiMo-Supported Catalysts.

ACS Omega 2020 Jun 17;5(25):15576-15585. Epub 2020 Jun 17.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 18 Fuxue Road, Beijing 102249, P.R. China.

A series of mesoporous materials of SBA-16 were in situ incorporated into ZSM-5 crystallites via a two-step self-assemble method, and hydrodesulfurization (HDS) catalysts were prepared on the corresponding ZSM-5/SBA-16 (ZS) composites. The characterization results indicated that ZSM-5 nanoseeds were fabricated into the silica framework of the ZS composites, and the three-dimensional 3 cubic structure of SBA-16 was retained simultaneously. In addition, the ZS series materials possessed open pores and large surfaces, which would facilitate the diffusion of reactants in the mesoporous channels. Read More

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http://dx.doi.org/10.1021/acsomega.0c01783DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7331072PMC

Analysis of Cuttings' Minerals for Multistage Hydraulic Fracturing Optimization in Volcanic Rocks.

ACS Omega 2020 Jun 19;5(25):14868-14878. Epub 2020 Jun 19.

CNPC Engineering Technology R&I of Xinjiang Oilfield, Karamay 843000, Xinjiang, China.

The fracturing of naturally fractured volcanic rocks has a significant impact on the logging due to the high degree of volcanic fracture development and the complex distribution of fractures. Such impact ultimately leads to the difficulty in determining the location of fracturing perforations and the increase in engineering costs. This article proposed a method of analyzing cuttings for geologging that return to the ground when drilling. Read More

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http://dx.doi.org/10.1021/acsomega.9b04051DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7330896PMC

Processing of dissolved organic matter from surface waters to sediment pore waters in a temperate coastal wetland.

Sci Total Environ 2020 Jun 24;742:140491. Epub 2020 Jun 24.

Organic Geochemistry Unit, Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China. Electronic address:

Coastal wetlands are active transitional ecotones between land and ocean, and are considered as hot spots of organic matter processing within the global carbon cycle, which dissolved organic matter (DOM) plays a critical role. In this study, combined use of ultrahigh-resolution mass spectrometry (FT-ICR MS) and complementary optical techniques was conducted to assess the detailed molecular composition of DOM in the temperate Liaohe coastal wetland (LCW), NE China in respect to the differences in DOM composition from surface water to sediment pore water. Significant positive correlations between salinity and dissolved organic carbon (DOC) concentrations were observed in both surface waters and pore waters. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.140491DOI Listing

Nanoscale integration of porphyrin in GroEL protein cage: Photophysical and photochemical investigation.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Jun 17;240:118596. Epub 2020 Jun 17.

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao, Shandong 266580, PR China. Electronic address:

In this paper, we introduce a new type of functional, supramolecular porphyrin conjugate created using the bacterial GroEL protein cage based on non-specific hydrophobic interaction. The synthesis, structure and property of the porphyrin conjugate were characterized by dynamic light scattering, UV-vis spectroscopy and fluorescence spectroscopy. We observed that the model zinc-tetraphenylporphyrin (Zn-TPP) with high hydrophobicity can be well-dispersed in aqueous solutions with the aid of GroEL open chamber, which is known to be a favorable nanocompartment for aggregation-prone molecules. Read More

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http://dx.doi.org/10.1016/j.saa.2020.118596DOI Listing
June 2020
2.353 Impact Factor

Influence of metals and metalloids on the composition and fluorescence quenching of the extracellular polymeric substances produced by the polymorphic fungus Aureobasidium pullulans.

Appl Microbiol Biotechnol 2020 Jun 23. Epub 2020 Jun 23.

Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee, Scotland, DD1 5EH, UK.

Aureobasidium pullulans is a ubiquitous and widely distributed fungus in the environment, and exhibits substantial tolerance against toxic metals. However, the interactions between metals and metalloids with the copious extracellular polymeric substances (EPS) produced by A. pullulans and possible relationships to tolerance are not well understood. Read More

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http://dx.doi.org/10.1007/s00253-020-10732-7DOI Listing

Aerobic sludge granulation in shale gas flowback water treatment: Assessment of the bacterial community dynamics and modeling of bioreactor performance using artificial neural network.

Bioresour Technol 2020 Jun 15;313:123687. Epub 2020 Jun 15.

State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China. Electronic address:

Flowback water from shale gas extraction is highly saline and comprises complex organic substances, thereby posing a significant challenge for the environmental management of the unconventional natural gas industry. In this work, an aerobic granular sludge (AGS) method was successfully used for the treatment of flowback water from shale gas extraction. The formed AGS had a diameter of 0. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123687DOI Listing

Ultrasmall Particle Sizes of Walnut-Like Mesoporous Silica Nanospheres with Unique Large Pores and Tunable Acidity for Hydrogenating Reaction.

Small 2020 Jun 22:e2002091. Epub 2020 Jun 22.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, 18 Fuxue Road, Beijing, 102249, P. R. China.

The large particle sizes, inert frameworks, and small pore sizes of mesoporous silica nanoparticles greatly restrict their application in the acidic catalysis. The research reports a simple and versatile approach to synthesize walnut-like mesoporous silica nanospheres (WMSNs) with large tunable pores and small particle sizes by assembling with Beta seeds. The as-synthesized Beta-WMSNs composite materials possess ultrasmall particulate sizes (70 nm), large radial mesopores (≈30 nm), and excellent acidities (221. Read More

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http://dx.doi.org/10.1002/smll.202002091DOI Listing

In Situ Catalysis and Extraction Approach for Fast Evaluation of Heterogeneous Catalytic Efficiency.

Anal Chem 2020 Jul 6. Epub 2020 Jul 6.

College of Science, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, P. R. China.

In situ monitoring of products generated by important heterogeneous catalytic reactions is of great significance for chemical industry, particularly when the products or intermediates are not sufficiently stable or occur at trace-level concentrations. It is therefore highly desirable to develop an integrated in situ catalysis and extraction method, which can simultaneously catalyze the reaction and enrich products while maintaining compatibility with analytical instrumentation. Herein, we propose an approach by depositing different types of metal nanocrystals, including gold, platinum, and palladium nanoparticles, onto fibrous silica microspheres coated fibers for integrated in situ catalysis and extraction. Read More

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http://dx.doi.org/10.1021/acs.analchem.0c01668DOI Listing
July 2020
5.636 Impact Factor

An integrated process for the advanced treatment of hypersaline petrochemical wastewater: A pilot study.

Water Res 2020 Jun 7;182:116019. Epub 2020 Jun 7.

Research Institute of Petroleum Processing, Sinopec, Beijing, 100083, China.

An integrated process combining ozonation, ceramic membrane filtration with biological activated carbon filtration (O+CMF + BAC process) was designed and evaluated using a pilot scale (10 m/d) test for the advanced treatment of hypersaline petrochemical wastewater in a coastal wastewater plant. The membrane flux and ozone dosage were optimized for the optimal treatment performance of this integrated process. The results showed that this integrated process performed well in pollutant removal. Read More

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http://dx.doi.org/10.1016/j.watres.2020.116019DOI Listing

Source identification and component characterization of dissolved organic matter in an acid mine drainage reservoir.

Sci Total Environ 2020 Jun 1;739:139732. Epub 2020 Jun 1.

School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui 230009, China. Electronic address:

Acid mine drainage (AMD) is one of the most serious environmental problems and extreme environments on the earth, with high concentrations of sulphate and dissolved metals. A comprehensive description of dissolved organic matter (DOM) in these reservoirs is lacking, and it can play an important role in AMD pollution treatment and ecosystem. Thus, the source, composition and property of DOM in an AMD reservoir in Ma'an shan, China were studied using Fourier transform ion cyclotron resonance mass spectrometry and three-dimension excitation emission matrix fluorescence spectroscopy. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.139732DOI Listing

Tetramethylpyrazine production from edible materials by the probiotic .

Prep Biochem Biotechnol 2020 Jun 13:1-8. Epub 2020 Jun 13.

Center for Bioengineering & Biotechnology and State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, China.

2,3,5,6-Tetramethylpyrazine (TMP) has health care functions, especially for cardiovascular and cerebrovascular health. In this study, we found that , a well-known probiotic, has the capability to produce acetoin, a precursor of TMP. The culture conditions and medium for the production of TMP by CICC 20138 were optimized. Read More

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http://dx.doi.org/10.1080/10826068.2020.1774777DOI Listing

Fungal Nanophase Particles Catalyze Iron Transformation for Oxidative Stress Removal and Iron Acquisition.

Curr Biol 2020 Jun 8. Epub 2020 Jun 8.

Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK; State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Oil and Gas Pollution Control, College of Chemical Engineering and Environment, China University of Petroleum, Beijing 102249, China. Electronic address:

Microbe-mineral interactions have shaped the surface of the Earth and impacted the evolution of plants and animals. Although more than two-thirds of known mineral species have biological imprints, how the biotransformation of minerals may have benefited microbial development, beyond nutritional and energetic use, remains enigmatic. In this research, we have shown that biogenic ferrihydrite nanoparticles are extensively formed at the interface between an actively growing fungus and an iron-containing mineral, hematite. Read More

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http://dx.doi.org/10.1016/j.cub.2020.05.058DOI Listing

Specification of the nitrogen functional group in a hydrotreated petroleum molecule using hydrogen/deuterium exchange electrospray ionization high-resolution mass spectrometry.

Analyst 2020 Jul 12;145(13):4442-4451. Epub 2020 Jun 12.

State Key Laboratory of Heavy Oil Processing & Petroleum Molecular Engineering Center (PMEC), China University of Petroleum, Beijing 102249, China.

Hydrotreatment is extensively used for the production of clean fuel. Attaining an understanding of the structural conversion of the nitrogen species during hydrotreatment is very challenging due to the compositional complexity and the absence of a proper characterization method. In the presented work, we coupled hydrogen/deuterium exchange (HDX) with positive-ion electrospray ionization high-resolution mass spectrometry ((+) ESI HR MS) to investigate the difference between the composition of the nitrogen-containing species and the functional groups before and after hydrotreatment. Read More

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http://dx.doi.org/10.1039/d0an00772bDOI Listing

Structural Transformation and Spatial Defect Formation of a Co(II) MOF Triggered by Varied Metal-Center Coordination Configuration.

Inorg Chem 2020 Jul 11;59(13):9005-9013. Epub 2020 Jun 11.

School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China.

In spite of the attractive potential application of the dynamic behavior and defect of metal-organic framework (MOF), the achievement of these features is a challenging goal in the MOF research field. Herein, we report a Co(II) MOF, namely, [Co(L)(4-PTZ)(HO)]·solvent (HL = 5-(isonicotinamido)isophthalic acid, 4-PTZ = 5-(4-pyridyl)-1-tetrazole), that features dynamic structural transformation behaviors. By varying the coordination configuration of metal center through the removal of coordinated water molecules, the porous compound could undergo structural transformation to give a new crystalline phase with larger pore dimension. Read More

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http://dx.doi.org/10.1021/acs.inorgchem.0c00845DOI Listing

In Situ TEM Observations of Discharging/Charging of Solid-State Lithium-Sulfur Batteries at High Temperatures.

Small 2020 Jun 9:e2001899. Epub 2020 Jun 9.

Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.

Understanding the structural evolution of Li S upon operation of lithium-sulfur (Li-S) batteries is inadequate and a complete decomposition of Li S during charge is difficult. Whether it is the low electronic conductivity or the low ionic conductivity of Li S that inhibits its decomposition is under debate. Furthermore, the decomposition pathway of Li S is also unclear. Read More

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http://dx.doi.org/10.1002/smll.202001899DOI Listing

Characterization of wastewater effluent organic matter with different solid phase extraction sorbents.

Chemosphere 2020 May 27;257:127235. Epub 2020 May 27.

State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing, 102249, China. Electronic address:

Effluent organic matter (EfOM) from municipal wastewater treatment plants (WWTPs) has received increasing attention due to its impacts on natural and engineered aquatic systems. A comprehensive understanding of molecular compositions of EfOM is crucial for controlling its negative effects and effective removal of it. Fourier transform-ion cyclotron resonance mass spectrometry (FTICR MS) is a powerful method to characterize molecular compositions of EfOM. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127235DOI Listing

Unusual Pd nanoparticle dispersion in microenvironment for p-nitrophenol and methylene blue catalytic reduction.

J Colloid Interface Sci 2020 May 27;578:37-46. Epub 2020 May 27.

Institute of Chemical Sciences, University of Peshawar, 25120 KP, Pakistan.

Palladium based catalysts are highly attractive for catalytic reactions. However, the catalytic activity is dependent on the dispersion and size of Pd nanoparticles (NPs). Herein, an efficient strategy is developed to regulate the size and dispersion of Pd NPs in nanoconfined spaces provided by Santa Barbara Amorphous-15 (SBA-15) occluded with template. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.05.093DOI Listing
May 2020
3.368 Impact Factor

Microplastics provide new microbial niches in aquatic environments.

Appl Microbiol Biotechnol 2020 Aug 4;104(15):6501-6511. Epub 2020 Jun 4.

Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee, Scotland, DD1 5EH, UK.

Microplastics in the biosphere are currently of great environmental concern because of their potential toxicity for aquatic biota and human health and association with pathogenic microbiota. Microplastics can occur in high abundance in all aquatic environments, including oceans, rivers and lakes. Recent findings have highlighted the role of microplastics as important vectors for microorganisms, which can form fully developed biofilms on this artificial substrate. Read More

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http://dx.doi.org/10.1007/s00253-020-10704-xDOI Listing

Modulation engineering of in situ cathodic activation of FeP based on W-incorporation for the hydrogen evolution reaction.

Nanoscale 2020 Jun 3;12(23):12364-12373. Epub 2020 Jun 3.

State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum (East China), Qingdao 266580, Shandong, China.

In situ electrochemical activation as a new pretreating method to adjust electrocatalytic performance attracts extensive attention. However, the activation mechanisms of electrocatalysts are still ambiguous. Herein, we propose a facile modulation strategy of in situ cathodic activation of FeP based on W-incorporation (W-FeP/IF) for the hydrogen evolution reaction (HER). Read More

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http://dx.doi.org/10.1039/d0nr02661aDOI Listing

In-House Standard Method for Molecular Characterization of Dissolved Organic Matter by FT-ICR Mass Spectrometry.

ACS Omega 2020 May 14;5(20):11730-11736. Epub 2020 May 14.

State Key Laboratory of Heavy Oil Processing, Petroleum Molecular Engineering Center (PMEC), China University of Petroleum, Beijing 102249, China.

Electrospray ionization (ESI) coupled with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) has been widely used for molecular characterization of dissolved organic matter (DOM). However, ESI FT-ICR MS generally has poor repeatability and reproducibility because of its inherent ionization mechanism and structural characteristics, which severely hindered its application in quantitative analysis of complex mixtures. In this article, we developed an in-house standard method for molecular characterization of DOM by ESI FT-ICR MS. Read More

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http://dx.doi.org/10.1021/acsomega.0c01055DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254807PMC

Photocatalytically renewable peptide-based electrochemical impedance method for sensing lipopolysaccharide.

Mikrochim Acta 2020 May 27;187(6):349. Epub 2020 May 27.

State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao, 266580, Shandong, People's Republic of China.

A peptide (Li5-025)-modified gold nanoparticle (AuNP)/(titania (TiO) + 5,10,15,20-tetrakis(4-aminophenyl)-21H,23H-porphine (TAPP))/glassy carbon electrode (GCE) was developed for lipopolysaccharide (LPS) determination. This electrode not only performs well in the electrochemical impedance determination of LPS in serum but can also be easily regenerated under light irradiation. Using Fe(CN) as a redox probe, LPS recognition can be indicated by the significantly increased electron-transfer resistance (R) as a result of the coaction of the increased steric hindrance from the peptide-LPS complex and the electrostatic repulsion between LPS and Fe(CN). Read More

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http://dx.doi.org/10.1007/s00604-020-04321-8DOI Listing

Stable yolk-structured catalysts towards aqueous levulinic acid hydrogenation within a single Ru nanoparticle anchored inside the mesoporous shell of hollow carbon spheres.

J Colloid Interface Sci 2020 May 16;576:394-403. Epub 2020 May 16.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing 102249, China.

To well address the problem of low stability for Ru-based catalysts against sintering and leaching during synthesis and aqueous levulinic acid (LA) hydrogenation to γ-valerolactone (GVL), herein we demonstrate an "inside-to-outside" synthetic strategy for robust yolk-structured nanospheres within a single Ru nanoparticle (NP, 4.2 nm) anchored inside the mesoporous shell (pore size, 4.0 nm), denoted as YS Ru@HMCS (yolk-structured Ru encapsulated into hollow mesoporous carbon sphere). Read More

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http://dx.doi.org/10.1016/j.jcis.2020.05.039DOI Listing
May 2020
3.368 Impact Factor

Molecular Characterization of Soluble Components in the Lignite by Sequential Solvent Extraction via Continuously Reducing Particle Size.

ACS Omega 2020 May 8;5(19):11075-11083. Epub 2020 May 8.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.

A lignite was subjected to sequential solvent extraction via continuously reducing particle size from around 20 to more than 200 mesh. Five sets of -hexane and methanol extracts from the particles were characterized by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS) and gas chromatography-mass spectrometry. The total extract yield for lignite when using hexane and methanol as solvents could reach to 0. Read More

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http://dx.doi.org/10.1021/acsomega.0c00952DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7241019PMC

Thermodynamics of Water-Cationic Species-Framework Guest-Host Interactions within Transition Metal Ion-Exchanged Mordenite Relevant to Selective Anaerobic Oxidation of Methane to Methanol.

J Phys Chem Lett 2020 Jun 4;11(12):4774-4784. Epub 2020 Jun 4.

Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States.

Low-temperature anaerobic methane conversion to methanol (MTM) using copper ion-exchanged mordenite (Cu-MOR) as the catalyst and water as the sole source of oxygen is promising for sustainable utilization of methane. Integrating calorimetric, spectroscopic, and structural methodologies, we report a systematic study on energetics of water-cationic species-framework guest-host interactions as a function of water loading for several mordenites relevant to low-temperature MTM. Notably, the near-zero coverage hydration enthalpy on Cu-MOR is -133. Read More

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http://dx.doi.org/10.1021/acs.jpclett.0c01331DOI Listing
June 2020
7.458 Impact Factor

High-capacity adsorption of Cr(VI) by lignin-based composite: Characterization, performance and mechanism.

Int J Biol Macromol 2020 May 20;159:839-849. Epub 2020 May 20.

Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemistry and Bioengineering, Shandong University of Science and Technology, Qingdao 277590, China. Electronic address:

An environmentally friendly lignin-based composite (Lignin-PEI) was facilely prepared via cross-linking enzymatic hydrolysis lignin matrix and branched poly (ethylene imine). The specific physicochemical and structural properties of lignin-PEI were characterized by elemental analysis, N physisorption, GPC, TG, SEM, FT-IR and XPS. The nitrogen content of lignin-PEI was 9. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.05.130DOI Listing

Valorization of Gelidium amansii for dual production of D-galactonic acid and 5-hydroxymethyl-2-furancarboxylic acid by chemo-biological approach.

Microb Cell Fact 2020 May 14;19(1):104. Epub 2020 May 14.

Key Laboratory of Forestry Genetics & Biotechnology (Nanjing Forestry University), Ministry of Education, Nanjing, 210037, People's Republic of China.

Background: Marine macroalgae Gelidium amansii is a promising feedstock for production of sustainable biochemicals to replace petroleum and edible biomass. Different from terrestrial lignocellulosic biomass, G. amansii is comprised of high carbohydrate content and has no lignin. Read More

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http://dx.doi.org/10.1186/s12934-020-01357-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7227364PMC

Molecular Evidence of Arsenic Mobility Linked to Biodegradable Organic Matter.

Environ Sci Technol 2020 Jun 29;54(12):7280-7290. Epub 2020 May 29.

State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, PR China.

Molecular characteristics of natural organic matter (NOM) and their potential connections to arsenic enrichment processes remain poorly understood. Here, we examine dissolved organic matter (DOM) in groundwater and water-soluble organic matter (WSOM) in aquifer sediments being depth-matched with groundwater samples from a typical arid-semiarid basin (Hetao Basin, China) hosting high arsenic groundwater. We used Fourier transform ion cyclotron resonance mass spectrometry to determine molecular characteristics of DOM and WSOM and evaluate potential roles of biodegradable compounds in microbially mediated arsenic mobility at the molecular level. Read More

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http://dx.doi.org/10.1021/acs.est.0c00737DOI Listing

Assisting Atomic Dispersion of Fe in N-Doped Carbon by Aerosil for High-Efficiency Oxygen Reduction.

ACS Appl Mater Interfaces 2020 Jun 28;12(23):25832-25842. Epub 2020 May 28.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, P.R. China.

Utilizing Zn as a "fencing" agent has enabled the pyrolytic synthesis of atomically dispersed metal-nitrogen-carbon (AD-MNC) materials for broad electrocatalysis such as fuel cells, metal-air batteries, and water electrolyzers. Yet the Zn residue troubles the precise identification of the responsible sites in active service. Herein we developed a simple aerosil-assisted method for preparing AD-MNC materials to cautiously avoid the introduction of Zn. Read More

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http://dx.doi.org/10.1021/acsami.0c04169DOI Listing
June 2020
6.723 Impact Factor

Highly green fluorescent NbC MXene quantum dots.

Chem Commun (Camb) 2020 Jun;56(49):6648-6651

Department of Orthopedics General Hospital of Chinese People's Liberation Army, Beijing 100853, China.

Here, two dimensional Nb2C quantum dots with green fluorescence were fabricated for the first time with a quantum yield (QY) of up to 19%, the highest reported for Nb2C dots so far with good photostability and pH stability. The S,N doping on Nb2C was considered to be the main reason for the enhanced high QY of the Nb2C dots and was proved by the density functional theory (DFT) calculations. It was demonstrated that the fluorescent probe could be utilized effectively for 3D brain organoid labeling and thus has huge prospects in biological sensing. Read More

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http://dx.doi.org/10.1039/d0cc02131hDOI Listing

Nitrogen-doped graphene quantum dots prepared by electrolysis of nitrogen-doped nanomesh graphene for the fluorometric determination of ferric ions.

Mikrochim Acta 2020 May 12;187(6):322. Epub 2020 May 12.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping, Beijing, 102249, China.

Nitrogen-doped graphene quantum dots (N-GQDs) were synthesized by direct electrolysis of a carbon cloth electrode coated with nitrogen-doped nanomesh graphene (NG) in high yield (~ 25%). The N-GQDs emit intense blue fluorescence with a quantum yield (QY) of 10% ± 3%. Meanwhile, the N-GQDs are rich in hydroxyl, carboxyl, basic pyridinic nitrogen, and nitro groups, which are conducive to strengthen the interaction between N-GQDs and Fe for highly sensitive determination of Fe ions. Read More

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http://dx.doi.org/10.1007/s00604-020-04294-8DOI Listing

Molecular transformation of dissolved organic matter in process water from oil and gas operation during UV/HO, UV/chlorine, and UV/persulfate processes.

Sci Total Environ 2020 Aug 28;730:139072. Epub 2020 Apr 28.

Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada. Electronic address:

This paper reported the impact of UV/HO, UV/chlorine, and UV/persulfate advanced oxidation processes on the molecular transformations of dissolved organic matter (DOM), removal of naphthenic acids (NAs) and acute toxicity in oil sands process water (OSPW). The UV/persulfate process exhibited the highest removal (81.2% with 2 mM dose) towards classical NAs and highest reduction in acute toxicity to Vibrio fischeri among the three processes. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.139072DOI Listing

Vapor Intrusion Investigations and Decision-Making: A Critical Review.

Environ Sci Technol 2020 Jun 27;54(12):7050-7069. Epub 2020 May 27.

National Engineering Research Centre of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China.

At sites impacted by volatile organic compounds (VOCs), vapor intrusion (VI) is the pathway with the greatest potential to result in actual human exposure. Since sites with VI were first widely publicized in late 1990s, the scientific understanding of VI has evolved considerably. The VI conceptual model has been extended beyond relatively simple scenarios to include nuances, such as biological and hydrogeological factors that may limit the potential for VI and alternative pathways, such as preferential pathways and direct building contact/infiltration that may enhance VI in some cases. Read More

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http://dx.doi.org/10.1021/acs.est.0c00225DOI Listing

SO-Tolerant Catalytic Removal of Soot Particles over 3D Ordered Macroporous AlO-Supported Binary Pt-Co Oxide Catalysts.

Environ Sci Technol 2020 Jun 13;54(11):6947-6956. Epub 2020 May 13.

State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum, Beijing 102249, People's Republic of China.

The catalytic purification of soot particles is dependent on the SO tolerance and activity of the catalysts in practical application. Herein, we have elaborately fabricated the nanocatalysts of three-dimensionally ordered macroporous (3DOM) AlO-supported binary Pt-cobalt oxide nanoparticles (NPs) using the method of gas bubbling-assisted membrane precipitation (GBMP), abbreviated as Pt-CoO/3DOM-AlO. Three-dimensionally ordered macroporous AlO support can not only improve the contact performance between the soot and active sites but also possess surface acidity to improve the SO tolerance. Read More

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http://dx.doi.org/10.1021/acs.est.0c00752DOI Listing
June 2020
5.330 Impact Factor

Adsorption-Hydration Sequence Method for Methane Storage in Porous Material Slurry.

Front Chem 2020 21;8:294. Epub 2020 Apr 21.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China.

Porous materials are deemed to be capable for promoting hydrate formation, while for the purpose of hydrate-based gas storage, those systems containing porous materials often cannot meet the requirement of high storage density. To increase the storage density, an adsorption-hydration sequence method was designed and systematically examined in this study. Methane storage and release in ZIF-8 slurries and fixed beds were investigated. Read More

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http://dx.doi.org/10.3389/fchem.2020.00294DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7186503PMC

Chemical characterization in hydraulic fracturing flowback and produced water (HF-FPW) of shale gas in Sichuan of China.

Environ Sci Pollut Res Int 2020 Jul 5;27(21):26532-26542. Epub 2020 May 5.

Department of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, Sichuan, China.

Large amounts of fracturing flowback and wastewater with complex compositions are produced during hydraulic fracturing. Characterization of hydraulic fracturing flowback and produced water (HF-FPW) is an important initial step in efforts to determine a suitable treatment method for this type of wastewater. In the present study, fracturing flowback and produced water samples were obtained from well CN-F and well CN-E in the prophase and anaphase stages of the Changning shale gas mining area. Read More

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http://dx.doi.org/10.1007/s11356-020-08670-yDOI Listing

Ultrathin Film Composite Membranes Fabricated by Novel In Situ Free Interfacial Polymerization for Desalination.

ACS Appl Mater Interfaces 2020 Jun 18;12(22):25304-25315. Epub 2020 May 18.

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China.

Ultrathin polyamide nanofilms are desirable as the separation layers for the highly permeable thin-film composite (TFC) membranes, and recently, their lowest thickness limits have attracted a lot of attention from researchers. Due to the interference of the underlying substrate, preparing a defect-free, ultrathin polyamide nanofilm directly on top of a membrane substrate remains a great challenge. Herein, we report a novel fabrication technique of TFC membranes, named (IFIP), where the IP reaction occurs at the uniform, free oil-water interface dozens of microns above the substrate, and then the resulting nanofilm spontaneously assembles into the TFC structure without extra manual transfer. Read More

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http://dx.doi.org/10.1021/acsami.0c05166DOI Listing

Molecular-level comparison study on microwave irradiation-activated persulfate and hydrogen peroxide processes for the treatment of refractory organics in mature landfill leachate.

J Hazard Mater 2020 Oct 21;397:122785. Epub 2020 Apr 21.

Faculty Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China. Electronic address:

This study investigated the degradation of organics in mature leachate treated by microwave radiation-activated persulfate (MW/PS) and hydrogen peroxide (MW/HO) processes. Obvious synergistic effects existed in both the MW/PS and MW/HO processes, but were significantly higher in the MW/PS process. Refractory organics were better degraded by the MW/PS process than the MW/HO process due to the major contribution of SO-. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.122785DOI Listing
October 2020

Molecular investigation into the transformation of dissolved organic matter in mature landfill leachate during treatment in a combined membrane bioreactor-reverse osmosis process.

J Hazard Mater 2020 Oct 20;397:122759. Epub 2020 Apr 20.

Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China. Electronic address:

This study investigated the effectiveness of a combined membrane bioreactor (MBR) and reverse osmosis (RO) process for treating leachate produced by a large-scale anaerobic landfill. The MBR process had limited treatment efficiency for removing organic pollutants, but when combined with RO, the integrated system completely removed macromolecular compounds (i.e. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.122759DOI Listing
October 2020

Bioelectrochemical remediation of Cr(VI)/Cd(II)-contaminated soil in bipolar membrane microbial fuel cells.

Environ Res 2020 Apr 24;186:109582. Epub 2020 Apr 24.

State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Beijing, 102249, China; College of Chemical Engineering and Environment, China University of Petroleum, Beijing, 102249, China.

Heavy-metal contaminated soils post great environmental and health concerns. In this study, Cr and Cd which are frequently observed in contaminated soils, were selected as representatives of hazardous heavy metals because of their different redox potentials and electric charges. Cr(VI)-, Cd(II)-, Cr(VI)/Cd(II)-contaminated soils were remediated in two-chamber air-cathode MFCs, in order to investigate the remediation of soil contaminated by single heavy metal and mixed heavy metals. Read More

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http://dx.doi.org/10.1016/j.envres.2020.109582DOI Listing

Lattice distortion induced internal electric field in TiO photoelectrode for efficient charge separation and transfer.

Nat Commun 2020 May 1;11(1):2129. Epub 2020 May 1.

Nanomaterials Centre, Australian Institute for Bioengineering and Nanotechnology, and School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia.

Providing sufficient driving force for charge separation and transfer (CST) is a critical issue in photoelectrochemical (PEC) energy conversion. Normally, the driving force is derived mainly from band bending at the photoelectrode/electrolyte interface but negligible in the bulk. To boost the bulky driving force, we report a rational strategy to create effective electric field via controllable lattice distortion in the bulk of a semiconductor film. Read More

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http://dx.doi.org/10.1038/s41467-020-15993-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7195485PMC

Promoting HO production via 2-electron oxygen reduction by coordinating partially oxidized Pd with defect carbon.

Nat Commun 2020 May 1;11(1):2178. Epub 2020 May 1.

Department of NanoEngineering, University of California San Diego, La Jolla, California, 92093, USA.

Electrochemical synthesis of HO through a selective two-electron (2e) oxygen reduction reaction (ORR) is an attractive alternative to the industrial anthraquinone oxidation method, as it allows decentralized HO production. Herein, we report that the synergistic interaction between partially oxidized palladium (Pd) and oxygen-functionalized carbon can promote 2e ORR in acidic electrolytes. An electrocatalyst synthesized by solution deposition of amorphous Pd clusters (Pd and Pd) onto mildly oxidized carbon nanotubes (Pd-OCNT) shows nearly 100% selectivity toward HO and a positive shift of ORR onset potential by ~320 mV compared with the OCNT substrate. Read More

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http://dx.doi.org/10.1038/s41467-020-15843-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7195490PMC

Wood-Derived Carbon with Selectively Introduced C═O Groups toward Stable and High Capacity Anodes for Sodium Storage.

ACS Appl Mater Interfaces 2020 Jun 13;12(24):27499-27507. Epub 2020 May 13.

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.

Biomass-derived carbon is a promising sustainable anode material for sodium-ion batteries (SIBs). Although the electrochemical performance can be improved by introducing functional groups, the selective introduction of single functional groups into biomass carbon remains difficult. Here, we overcome this challenge by developing a wood-derived carbon with selectively introduced C═O groups by combining tetramethoxysilane (TMOS) with wood cellulose pulps. Read More

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http://dx.doi.org/10.1021/acsami.0c04469DOI Listing

Intrinsic Defect-Rich Hierarchically Porous Carbon Architectures Enabling Enhanced Capture and Catalytic Conversion of Polysulfides.

ACS Nano 2020 May 7;14(5):6222-6231. Epub 2020 May 7.

State Key Laboratory of Heavy Oil Processing, Institute of New Energy, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China.

Despite their promising potential, the real performance of lithium-sulfur batteries is still heavily impeded by the notorious shuttle behavior and sluggish conversion of polysulfides. Complex structures with multiple components have been widely employed to address these issues by virtue of their strong polarity and abundant surface catalytic sites. Nevertheless, the tedious constructing procedures and high cost of these materials make the exploration of alternative high-performance sulfur hosts increasingly important. Read More

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http://dx.doi.org/10.1021/acsnano.0c02294DOI Listing

2D Fe-doped NiO nanosheets with grain boundary defects for the advanced oxygen evolution reaction.

Dalton Trans 2020 May 29;49(19):6355-6362. Epub 2020 Apr 29.

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China.

Two-dimensional (2D) nanomaterials with grain boundary defects are attractive to researchers in many fields, such as energy conversion and storage, sensing, catalysis and biological medicine. In this work, a nanostructure of 2D Fe-doped NiO nanosheets (NiFeO) with grain boundary defects was designed and applied in the electrocatalytic oxygen evolution reaction. This nanomaterial was synthesized through a solvothermal strategy followed by a thermally driven conversion process. Read More

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http://dx.doi.org/10.1039/c9dt04633jDOI Listing

Analyzing carbon emission transfer network structure among provinces in China: new evidence from social network analysis.

Environ Sci Pollut Res Int 2020 Jun 26;27(18):23281-23300. Epub 2020 Apr 26.

School of Economics, BZ University, Multan, Pakistan.

Domestic trade plays a key role in China's rapid economic progress. However, the increased domestic trade causes significant variations in carbon emission transfer among provinces. This study adopted the multi-region input-output (MRIO) model and social network analysis (SNA) to estimate the carbon emission transfer. Read More

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http://dx.doi.org/10.1007/s11356-020-08911-0DOI Listing

Novel betaine-amino acid based natural deep eutectic solvents for enhancing the enzymatic hydrolysis of corncob.

Bioresour Technol 2020 Aug 18;310:123389. Epub 2020 Apr 18.

Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemistry and Bioengineering, Shandong University of Science and Technology, Qingdao 277590, China. Electronic address:

A novel natural deep eutectic solvent (NDES) with water content ranging from 65 to 93 wt%, in which betaine (Bet) acts as the cation and amino acids (AAs) as the anions, was prepared by a simple and green chemical route. [Bet][AA] NDES showed excellent xylan and lignin solubility, however, scare cellulose solubility. A mild and facile pretreatment process with [Bet][AA] NDES was carried out at 60 °C for 5 h. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123389DOI Listing

An Analysis of Public Opinions Regarding Take-Away Food Safety: A 2015-2018 Case Study on Sina Weibo.

Foods 2020 Apr 18;9(4). Epub 2020 Apr 18.

Department of Industrial and System Engineering, University at Buffalo, Buffalo, NY 14260, USA.

Take-away food (also referred to as "take-out" food in different regions of the world) is a very convenient and popular dining choice for millions of people. In this article, we collect online textual data regarding "take-away food safety" from Sina Weibo between 2015 and 2018 using the Octopus Collector. After the posts from Sina Weibo were preprocessed, users' emotions and opinions were analyzed using natural language processing. Read More

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http://dx.doi.org/10.3390/foods9040511DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7230534PMC

A reliable and facile fluorescent sensor from carbon dots for sensing 2,4,6-trinitrophenol based on inner filter effect.

Sci Total Environ 2020 Jun 3;720:137680. Epub 2020 Mar 3.

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing 102249, China.

2,4,6-Trinitrophenol (TNP) has absorbed much concerns because of its toxic effect and threat on the environment, which results from the fact that it is an important and universal reagent widely utilized for manufacturing many products. It is of great necessity to explore facile and efficient methods for monitoring TNP. In present study, carbon dots (CDs), a new carbonaceous nanomaterial with strong fluorescence, was applied to build a novel sensor for highly sensitive and selective detection of TNP. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2020.137680DOI Listing