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Journal of Environmental Sciences 2021年第10期33卷 96-106页

作者： Weilai Wang Fan Zhang Yunfei Zhang Lei Xu Yuansheng Pei Junfeng Niu State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan 523808China

Hydrodechlorination is a promising technology for the remediation of water body contaminated with trichloroethylene(TCE).In this work,the liquid-phase hydrogenation of TCE by Raney Ni(R-Ni)and Pd/C under an open system have been studied,in which nascent H_(2)(Nas-H_(2))generated in situ from the cathode acted as a hydrogen *** results showed that TCE was completely eliminate from the solution through the synergistic effects of hydrodechlorination and air flotation due to the formation of continuous micro/nano-sized Nas-H_(2)bubbles from the ***,the effects of inorganic anions and organic solvents on R-Ni and Pd/C hydrogenation activity were investigated,*** results showed that NO_(3)^(-) and acetonitrile can form a competitive reaction with TCE;Sulfur with lone-pair electrons will cause irreversible poisoning to these two catalysts,and have a stronger inhibitory effect on Pd/*** work helps to realize the separation of volatile halogenated compounds from water environment and provides certain data support for the choice of catalyst in the actual liquid-phase hydrogenation system.

关键词： Nascent H_(2) Hydrogenation Air flotation Trichloroethylene Sulfur poisoning

Controllable emission bands and morphologies of high-quality CsPbX3 perovskite nanocrystals prepared in octane

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Nano Research 2018年第9期11卷 4654-4663页

作者： Shuai Ye Mengjie Zhao Jun Song Junle Qu Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and guangdong province College of Optoelectronic Engineering Shenzhen University Shenzhen 518060 China

Halide perovskite （CsPbX3, X = C1, Br, or I） quantum dots have received increasing attention as novel colloidal nanocrystals （NCs）. Accurate control of emission bands and NC morphologies are vital prerequisites for most CsPbX3 NC practical applications. Therefore, a facile method of synthesizing CsPbX3 （X = C1, Br, or I） NCs in the nonpolar solvent octane was developed. The process was conducted in air at - 90℃ to synthesize high-quality CsPbX3 NCs showing 12-44 nm wide emission and high photoluminescence quantum yield, exceeding 90%. An in situ anion-exchange method was developed to tune CsPbX3 NC photoluminescence emission, using PbX2 dissolved in octane as the halide source. NC morphology was controlled by dissolving specific metal-organic salts in the precursor solution prior to nucleation, and nanocubes, nanodots, nanosheets, nanoplatelets, nanorods, and nanowires were obtained following the same general method providing a facile, versatile route to controlling CsPbX3 NC emission bands and morphologies, which will broaden the range of CsPbX3 NC practical applications.

关键词： CsPbX3 quantum dots nonpolar solvent octane controllable composition controllable morphology high quantum yield

THE GLOBAL EXISTENCE AND A DECAY ESTIMATE OF SOLUTIONS TO THE PHAN-THEIN-TANNER MODEL

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Acta Mathematica Scientia 2022年第3期42卷 1058-1080页

作者： Ruiying WEI Yin LI Zheng-an YAO School of Mathematics and Statistics Shaoguan UniversityShaoguan 512005China Faculty of Education Shaoguan UniversityShaoguan 512005China Department of Mathematics Sun Yat-sen UniversityGuangzhou 510275China

In this paper,we study the global existence and decay rates of strong solutions to the three dimensional compressible Phan-Thein-Tanner *** a refined energy method,we prove the global existence under the assumption that the H^(3) norm of the initial data is small,but that the higher order derivatives can be *** the initial data belong to homogeneous Sobolev spaces or homogeneous Besov spaces,we obtain the time decay rates of the solution and its higher order spatial ***,we also obtain the usual L^(p)-L^(2)(1≤p≤2)type of the decay rate without requiring that the Lpnorm of initial data is small.

关键词： Phan-Thein-Tanner model global existence time decay rates

Highly dispersed CeO_(2-x)nanoparticles with rich oxygen vacancies enhance photocatalytic performance of g-C_(3)N_(4)toward methyl orange degradation under visible light irradiation

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Journal of Rare Earths 2022年第8期40卷 1255-1263页

作者： Xuejun Xu Tianhua Huang Yisheng Xu Huawen Hu Shuang Liao Xiaohong Hu Dongchu Chen Min Zhang School of Materials Science and Hydrogen Energy Foshan UniversityFoshan 528000China guangdong Key Laboratory for Hydrogen Energy Technologies Foshan 528000China

CeO_(2)/g-C_(3)N_(4)photocatalysts have attracted tremendous attention in the photocatalytic degradation of organic *** design and construction of highly active CeO_(2)/g-C_(3)N_(4)photocatalysts without harsh conditions are still ***,highly dispersed CeO_(2-x)nanoparticles with rich oxygen vacancies were successfully precipitated on the surface of g-C_(3)N_(4)under mild *** fabricated CeO_(2-x)/g-C_(3)N_(4)exhibits remarkable activity and stability for photocatalytic degradation of MO *** optimal rate constant of MO degradation over CeO_(2-x)/g-C_(3)N_(4)is about 0.031 min^(-1),which is three times higher than that of g-C_(3)N_(4).A negligible activity decrease is observed after three cycling *** enhanced catalytic performance can be ascribed to the excellent dispersion of CeO_(2-x)with rich oxygen vacancies that benefit O_(2)adsorption and visible light *** addition,the proper band alignment between CeO_(2-x)and gC_(3)N_(4)is conducive to the highly efficient separation of photogenerated electron-hole pairs.

关键词： CeO_(2-x) G-C_(3)N_(4) Heterojunctions Oxygen vacancies Rare earths

Defect Engineering of Carbons for Energy Conversion and Storage Applications

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Energy & Environmental Materials 2023年第3期6卷 264-285页

作者： Xianyou Luo Heng Zheng Wende Lai Ping Yuan Shengwei Li De Li Yong Chen guangdong Key Laboratory for Hydrogen Energy Technologies School of Materials Science and Hydrogen EnergyFoshan UniversityFoshan 528000China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti ResourcesHainan UniversityHaikou 570228China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

Sustainable energy conversion and storage technologies are a vital prerequisite for neutral future *** this end,carbon materials with attractive features,such as tunable pore architecture,good electrical conductivity,outstanding physicochemical stability,abundant resource,and low cost,have used as promising electrode materials for energy conversion and *** engineering could modulate the structures of carbon materials,thereby affecting their electronic *** presence of defects on carbons may lead to asymmetric charge distribution,change in geometrical configuration,and distortion of the electronic structure that may result in unexpected electrochemical *** this review,recent advances in defects of carbons used for energy conversion and storage were examined in terms of types,regulation strategies,and fine characterization means of *** applications of such carbons in supercapacitors,rechargeable batteries,and electrocatalysis were also *** perspectives toward the development of defect engineering carbons were *** all,novel insights related to improvement in high-performance carbon materials for future energy conversion and storage applications were provided.

关键词： carbon materials defect engineering electrocatalysis rechargeable batteries supercapacitors

Fabrication of Cu/rGO/MoS2 nanohybrid with energetic visible-light response for degradation of rhodamine B

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Chinese Chemical Letters 2019年第12期30卷 2245-2248页

作者： Huanjing Liang Peng Hua Yufei Zhou Zhimin Fu Jiaoning Tang Junfeng Niu Shenzhen Key of Special Functional Materials College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Research Center for Eco-Environmental Engineering Dongguan University of TechnologyDongguan 523808China Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau School of Ecology and EnvironmentInner Mongolia UniversityHohhot 010021China

A novel visible-light-driven Cu/rGO/MoS2(CRM) ternary nanostructure as a photocatalyst with high catalytic activity towards environmental purification using solar energy was successfully synthesized through a facile solvothermal *** was found that the nanoflower structure of MoS2 increased the number of its exposed *** rGO as a catalytic substrate played a role of charge-carrier channel to improve the separation of holes and electrons,which originated from the band gap absorption of *** content of Cu in photocatalyst affected photocatalytic performance *** the optimal 30% Cu/rGO/MoS2 possessed the highest photocatalytic performance,which could be attributed to the improved separation of charges and synergistic effects among Cu,rGO and *** removal efficiency of Rhodamine B(RhB) over CRM was up to 100% in 5 *** as a photocatalyst maintained good reproducibility and stability during 3 times of the recycle *** results indicate CRM is a promising photocatalyst for degrading organic pollutants in wastewater.

关键词： CRM Ternary nanostructures Photodegradation Rhodamine B

Unraveling the role of NiSnPH@OOH/CC perovskite hydroxide for efficient electrocatalytic oxidation of methanol to formate

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Nano Research 2024年第4期17卷 2388-2399页

作者： Jing Shao Yusheng Fang Xiaobing Wu Muhammad Imran Abdullah Youkun Tao College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China School of Science Harbin Institute of TechnologyShenzhen 518055China

The sluggish kinetics of oxygen evolution reaction(OER)is the key tailback for hydrogen production from the water *** OER with thermodynamically auspicious methanol oxidation reaction(MOR)can significantly boost the H_(2) and value-added products ***,it is currently challenging to achieve a synergistic manipulation of product selectivity and performance for MOR ***,we report NiSnPH@OOH/CC(CC=carbon cloth)perovskite hydroxide nanosphere as an efficient MOR electrocatalyst with high activity,stability,and selectivity towards methanol oxidation to formate.A surface amorphous layer of defect rich NiOOH was generated in operando by selective Sn leaching with stable perovskite hydroxide bulk structure,which mitigates the oxidative power and optimizes the local coordination environment of the active NiOOH *** situ Raman combined with electrochemical studies further confirm the key active species,NiOOH,generated in operando enhance the MOR and blocking the over oxidation of methanol to CO_(2).As a result,NiSnPH@OOH/CC effectively masks the OER and attains>99%selectivity with 100%Faradic efficiency for *** results of this study show the advances of NiSnPH@OOH/CC as an efficient electrocatalyst for MOR and also suggest its potential applications for various small organic molecules oxidation.

关键词： perovskite hydroxide small organic molecules nickel oxy(hydroxide) value-added products methanol oxidation reaction

Visible light-induced synthesis of biomass-derived quinoxaline by using Co phthalocyanine immobilized on pyridine-doped g-C_(3)N_(4)

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Journal of Energy Chemistry 2023年第7期82卷 638-652,I0013页

作者： Mingren Jin Seyed Mohsen Sadeghzadeh Jinzhu Chen College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 511443GuangdongChina New Materials Technology and Processing Research Center Department of ChemistryNeyshabur BranchIslamic Azad UniversityNeyshaburIran

Visible light-driven valorization of biomass has recently been a pioneering field for nitrogen-containing heterocyclics syntheses due to its sustainable ***,various aromatic ring-doped g-C_(3)N_(4) nanosheets(Ar-g-C_(3)N_(4);Ar=Py,Pm,Ph)were precisely designed to modulate their intrinsic electronic and band structure,which involves pyridine(Py),pyrimidine(Pm),and benzene(Ph)-doped g-C_(3)N_(4).Photocatalysts(CoPc/Ar-g-C_(3)N_(4)) of cobalt(II)phthalocyanine(CoPc)-fabricated Ar-g-C_(3)N_(4) were then developed for oxidative cyclization of furoin with 1,2-phenylenediamines for syntheses of various biomass-derived quinoxalines under visible-light *** catalytic activity(in terms of TOFs)of serial CoPc/Ar-g-C_(3)N_(4) samples increased with their transient photocurrents with CoPc/Py-g-C_(3)N_(4) as the most active *** CoPc/Py-g-C_(3)N_(4),CoPc species functioned as both sensitizer and catalytic sites;while,doped Py led to a narrowed bandgap *** research further demonstrated that O_(2) was activated to superoxide radical(·O_(2)^(-)) by photoexcited high-level-energy electron(HLEE)transfer from Py-g-C_(3)N_(4) to CoPc for the subsequent aerobic oxidation.

关键词： Biomass Functionalized carbon nitride Nitrogen-containing heterocyclics Photocatalysis Quinoxaline

Taxonomic reassessment of Polysiphonia hainanensis(Rhodomelaceae,Rhodophyta)based on molecular and morphological analyses

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Journal of Oceanology and Limnology 2021年第3期39卷 1077-1084页

作者： Huaqiang TAN Wenhua LIU Ping LI guangdong Provincial Key Laboratory of Marine Biotechnology Institute of Marine SciencesShantou UniversityShantou 515063China Southern Marine Science and Engineering guangdong Laboratory(Guangzhou) Guangzhou 511458China

Polysiphonia hainanensis was previously described from Hainan,China,but DNA sequence had never been provided and its phylogenetic position in Polysiphonieae has not been clear so *** classification of Polysiphonieae has changed recently based on the molecular analyses and detail morphological anatomy,consequently,the generic assignment of some species must be *** this study,we analyzed phylogenetic relationships of *** and the related taxa in Polysiphonieae and Streblocladieae based on rbcL sequences,with specimens collected from the type locality and the area *** genetic types were detected,and formed a clade with Bryocladia thyrsigera with strong bootstrap support,in which the divergence was less than 0.81%.Furthermore,based on morphological analyses,we found characteristics of Chinese specimens,number of pericentral cells,percurrent axis,determinate branchlets,branching pattern,spermatangial axes development,and arrangement of tetrasporangia,etc.,were consistent with those of *** with morphological and molecular analyses,*** was taken a synonymous of ***,and gametophytes of this species were found from China for the first time.

关键词： Bryocladia phylogeny Polysiphonieae rbcL

Structural engineering of hard carbon through spark plasma sintering for enhanced sodium-ion storage

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Rare Metals 2024年第9期43卷 4274-4285页

作者： Hao-Ming Xiao Heng Zheng Ping Yuan Jun-Hui Luo Lin-Lin Shen Jie-Feng Tan Xian-You Luo De Li Yong Chen guangdong Key Laboratory for Hydrogen Energy Technologies School of Materials Science and Hydrogen EnergyFoshan UniversityFoshan 528000China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti ResourcesHainan UniversityHaikou 570228China

Hard carbon(HC)has emerged as one of the superior anode materials for sodium-ion batteries(SIBs),with its electrochemical performance significantly influenced by the presence of oxygen functional groups and its closed pore ***,current research on the structural adjustment of these oxygen functional groups and the closed pore architecture within HC remains ***,energy-efficient and contamination-free spark plasma sintering technology was employed to tune the structure of coconut-shell HC,resulting in significant adjustments to the content of carboxyl(decreasing from 5.71 at%to 2.12 at%)and hydroxyl groups(decreasing from 7.73 at%to 6.26 at%).Crucially,these modifications reduced the irreversible reaction of oxygen functional groups with Na^(+).Simultaneously,a substantial number of closed pores with an average diameter of 1.22 nm were generated within the HC,offering an ideal environment for efficient Na^(+)*** structural changes resulted in a remarkable improvement in the electrochemical performance of the modified *** reversible specific capacity of the modified HC surged from 73.89 mAh·g^(-1)to an impressive 251.97 m Ah·g^(-1)at a current density of 50 mA·g^(-1).Even at 400 mA·g^(-1),the reversible specific capacity increased significantly from 14.55 to 85.44 mAh·g^(-1).Hence,this study provides a novel perspective for designing tailored HC materials with the potential to develop high-performance SIBs.

关键词： Hard carbon Spark plasma sintering Sodiumion batteries Closed pores Oxygen functional groups