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Plasma Science and Technology 2004年第6期6卷 2546-2548页

作者：朱爱民聂龙辉张秀玲石川宋志民徐勇 Laboratory of Plasma Physical Chemistry Dalian University of Technology Dalian 116024 China Center for Nano Materials and Science Dalian University of Technology Dalian 116024 China Laboratory of Plasma Physical Chemistry Dalian University of Technology Dalian 116024 China

A supported TiO2/γ-Al2O3 photocatalyst has been prepared by γ-Al2O3 pellet-filled dielectric barrier discharges induced plasma CVD at atmospheric pressure and room temperature. The TiO2/γ-Al2O3 photocatalyst exhibits higher photocatalytic activity than Degussa P25, and much higher photocatalytic activity than that prepared by thermal CVD.

关键词： plasma CVD dielectric barrier discharges photocatalyst

In-Situ Nitrogen Doping of the TiO2 photocatalyst Deposited by PEALD for Visible Light Activity

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Plasma Science and Technology 2014年第3期16卷 239-243页

作者：饶志鹏万军李超波陈波刘键黄成强夏洋 Key Laboratory of Microelectronics Devices & Integrated Technology Institute of MicroelectronicsChinese Academy of Sciences Jiaxing Research and Commercialization Center for Microelectronics Equipment Jiaxing Kemin Electronic Equipment & Technologies CO. LTD

In this paper, an N-doped titanium oxide （TiO2） photocatalyst is deposited by a plasma-enhanced atomic layer deposition （PEALD） system through the in-situ doping method. X-ray photoelectron spectroscopy （XPS） analysis indicates that substitutional nitrogen atoms （-395.9 eV） with 1 atom% are effectively doped into TiO2 films. UV-VIS spectrometry shows that the in-situ nitrogen doping method indeed enhances the visible-activity of TiO2 films in the 425-550 nm range, and the results of the performance tests of the N-doped TiO2 films also imply that the photocatalysis activity is improved by in-situ doping. The in-situ doping mechanism of the N-doped TiO2 film is suggested according to the XPS results and the typical atomic layer deposition process.

关键词： plasma-enhanced atomic layer deposition in-situ nitrogen plasma N-dopedTiO2 photocatalyst

Construction of direct-Z-scheme heterojunction photocatalyst of g-C_(3)N_(4)/Ti_(3)C_(2)/TiO_(2)composite and its degradation behavior for dyes of Rhodamine B

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Chinese Journal of Chemical Engineering 2024年第9期73卷 222-234页

作者： Hanlin Qian Jianping Zou Hongxia Liu Aishun Ma Shitong Xu Ting Li Sili Ren Jiangxi Key Laboratory of Mining&Metallurgy Environmental Pollution Control Jiangxi University of Science and TechnologyGanzhou 341099China Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources Ganzhou 341099China Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China

Direct-Z-scheme g-C_(3)N_(4)/Ti_(3)C_(2)/TiO_(2)photocatalyst with giant internal electric field was prepared by onestep aqueous sonication self-assembly method using g-C_(3)N_(4)and MXene of Ti_(3)C_(2)as the source *** chemical composition and structure of the catalysts was characterized by FT-IR,XRD,SEM,TEM,and *** XPS characterization indicated that Ti_(3)C_(2)was partially oxidized to TiO_(2)during the composite *** a result,an efficient direct-Z-scheme heterojunction structure consisting of the g-C_(3)N_(4)and TiO_(2)with Ti_(3)C_(2)as an electron bridge was *** photocatalytic performance of the prepared catalysts was evaluated by degrading the Rhodamine B(RhB)*** with the single g-C_(3)N_(4),the g-C_(3)N_(4)/Ti_(3)C_(2)/TiO_(2)composite photocatalyst exhibited efficient and stable photocatalytic degradation ability,with a degradation efficiency as high as 99.2%for RhB under optimal conditions(2%Ti_(3)C_(2),pH=3).The high degradation performance of g-C_(3)N_(4)/Ti_(3)C_(2)/TiO_(2)for RhB was attributed to the combination of Ti_(3)C_(2),TiO_(2),and g-C_(3)N_(4)components,forming a direct-Z-scheme heterojunction with a high-speed electron transport channel *** role of Z-scheme heterojunctions in electron transport is verified by photoelectrochemical characterization,along with photoluminescence(PL).Our research provides a simple method to design photocatalysts by constructing direct-Z-scheme electron transport channels for highly efficient treatment of dye wastewater.

关键词： photocatalyst Direct-Z-scheme heterojunction RhB dye wastewater g-C_(3)N_(4) MXene Ti_(3)C_(2)

Facile one-pot hydrothermal method to prepare Sn(Ⅱ) and N co-doped TiO_(2) photocatalyst for water splitting under visible light irradiation

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Rare Metals 2022年第2期41卷 406-414页

作者： Xiao-Huan Jiang Ying-Nan Duan Yu Tian Meng Chen Mao-Kun Li Huan-Huan Liu Wan-Liang Yang Meng-Kui Tian School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China

In this paper,a visible light-responsive Sn^(2+)and N co-doped TiO_(2)photocatalyst was prepared by facile one-pot hydrothermal *** as-prepared samples were characterized in detail by a series of characterization *** results showed that the Sn^(2+)and N elements were co-doped into TiO_(2),while the catalyst still maintains anatase crystal structure and gets irregular little nanocluster in diameter of 9–10 nm with higher specific surface *** absorption edge of Sn^(2+)and N co-doped TiO_(2)extends to the visible light *** with Sn^(2+)-doped TiO_(2)and N-TiO_(2),the absorption edges have obvious red-shift of about 50 and 70 nm,*** synergistic effect of O 2p-N 2p and O 2p-Sn 5s hybridization to form impurity levels is the main reason for the *** hydrogen production performance of the Sn^(2+)and N co-doping TiO_(2)(n(N)/n(Ti)=1)catalyst reached the maximum value of 0.37 mmol·h^(-1)·g^(-1)under visible light,which is higher than that of N-doped TiO_(2)and SnTiO_(2)-doped TiO_(2)*** result is due to the wider visible light region-responsive ability of Sn^(2+)and N codoped into TiO_(2).Furthermore,mild hydrothermal methods will not make the Sn^(2+)oxidized to Sn^(4+),which make the catalysts still maintain high photocatalytic *** work provides a simple and mild method for the preparation of dual-element co-doped TiO_(2)with high crystallinity,excellent performance and broad application prospects.

关键词： photocatalyst Photocatalytic water splitting Visible light driven Sn^(2+)and N co-doped TiO_(2)

Nanoscaled MnSnO_(2)@CsPbBr_(3) quantum dots heterostructure photocatalyst as efficient organic pollutants degradation by peroxymonosulfate;DFT calculation

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Journal of Materials Science & Technology 2023年第22期153卷 41-55页

作者： Raqiqa Tur Rasool Ghulam Abbas Ashraf Mohsin Pasha Muhammad Farooq Saleem Djamel Ghernaout Mohammed M.Fadhali Hai Guo Department of Physics Zhejiang Normal UniversityJinhuaZhejiang 321004China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China GBA branch of Aerospace Information Research Institute Chinese Academy of SciencesGuangzhou 510700China Chemical Engineering Department College of EngineeringUniversity of Ha’ilPO Box 2440Ha’il 81441Saudi Arabia Chemical Engineering Department Faculty of EngineeringUniversity of BlidaPO Box 270Blida 09000Algeria Department of Physics Faculty of ScienceJazan UniversityJazan 45142Saudi Arabia Department of Physics Faculty of ScienceIbb University 70270Yemen

In this work,we developed a promising photocatalyst in CsPbBr_(3) quantum dots(QDs)because of their exceptional optoelectronic ***,QDs applications in the field of photocatalysis were mainly hampered by their poor stability and insufficient charge transfer ***,a novel and efficient MnSnO_(2)@CsPbBr_(3)(MSO@QDs)nanocomposite was first time effectively designed and synthe-sized by a wet impregnation method for peroxymonosulfate(PMS)activation under the *** newly generated interface phase of QDs between MnSnO_(2)(MSO)showed great potential to improve light ab-sorption,leading to effective separation and transfer of photoelectron-hole *** novel nanocompos-ite MSO@QDs showed great Flurbiprofen(FL)removal efficiency under the PMS/Light *** should be noted that this nanocomposite removed 85.74%of FL in just 70 min,which was almost 1.11 and 2.51 times greater than using pure QDs and pure MSO,*** on thorough measurements of structural analysis,Brunauer-Emmett-Teller(BET),UV-vis spectra,electrochemical impedance spec-troscopy(EIS),transient photocurrent response,and a potential mechanism for organic pollutants degra-dation over MSO@QDs nanocomposite was *** principal reactive species of photoinduced holes(h^(+)),i.e.O_(2)^(˙−),SO_(4)^(˙−),^(˙)OH,and non-radical(^(1)O_(2))were characterized via scavengers’technique and electron paramagnetic resonance(EPR)*** highest photocatalytic performance for the re-moval of MO,MB,and IBU was demonstrated by MSO@QDs nanocomposite/PMS,revealing their excellent ability to remove organic pollutants through ***,the developed nanocompos-ite exhibited good stability in an aqueous *** to computational investigation using the density functional theory(DFT)method,the site’s higher Fukui index f^(0) value corresponds to a greater propensity to be attacked by reactive *** work offers a fresh perspective on developi

关键词： CsPbBr_(3)QDs MnSnO_(2) Peroxymonosulfate Nanocomposite photocatalyst Organic pollutants DFT

Constructing extrinsic oxygen vacancy on the surface of photocatalyst as CO_(2)and electrons reservoirs to improve photocatalytic CO_(2)reduction activity

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Journal of Environmental Sciences 2024年第6期140卷 37-45页

作者： Zaiyong Jiang Hao Li Zhimin Yuan Zheng Wang Maohong Fan Wenkang Miao Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Chemistry&Chemical Engineering and Environmental Engineering Weifang UniversityWeifangShandong 261061China Departments of Chemical and Petroleum Engineering University of WyomingLaramieWY 82071USA Materials Genome Institute Shanghai UniversityShanghai 200444China

Constructing own oxygen vacancies in the photocatalysts is a very promising method to improve their photocatalytic CO_(2)reduction ***,some catalysts have excellent stabilities,making it difficult for them to construct their own oxygen *** simplify the above difficulty of stable photocatalysts,constructing extrinsic oxygen vacancies on their surface as a novel idea is ***,a stable TiO_(2)nanosheet is chosen as a research object,we uniformly deposited BiOCl quantum dots on their surface via a simple adsorption-deposition *** is found that BiOCl quantum dots are able to simultaneously self-transform into defective BiOCl with many oxygen vacancies when the photocatalyst is performed photocatalytic CO_(2)*** extrinsic oxygen vacancies can act as“CO_(2)and photo-generated electrons reservoirs”to improve CO_(2)capture and accelerate the separation of photogenerated electrons and *** the above reasons,the modified TiO_(2)showed obvious enhancement of photocatalytic CO_(2)reduction compared to pristine TiO_(2)and *** work may open a new avenue to broaden the use of oxygen vacancies in the process of photocatalytic CO_(2)reduction.

关键词： Oxygen vacancy BiOCl photocatalyst CO_(2)reduction TiO_(2)

Influence of N doping and the functional groups of graphene on a RGO/TiO2 composite photocatalyst

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Science China(Technological Sciences) 2020年第6期63卷 1045-1054页

作者： TANG Bo HE YanFeng ZHANG ZhenYu WANG ZhengWei JI Li MA TingTing LI Sen DAI YuanZhe ZHANG GuoLiang School of Petroleum Engineering Changzhou UniversityChangzhou 213016China

Reduced graphene oxide(RGO)assisted TiO2 composite photocatalysts have attracted increased attention because of their high photocatalytic performance under both UV-and visible-light ***,the corresponding properties under the long wavelength irradiation is far from *** this study,a series of RGO samples with well-designed N impurity and optimized surface functional groups are prepared and employed during hybridization with TiO2(named N-RGO/TiO2).The coupling between the doped N atoms and surface functional groups is analyzed based on the resulting photocatalytic performances,and the specific mechanism is revealed by the EPR,IR and lifetime of the photoinduced *** comparing the corresponding performances of the RGO/TiO2 and RGO/N-TiO2 specimens,the results show that the surface functional groups of the RGO serve as a precondition to achieveπ-d coupling between the graphene basal plane and TiO2 nanoparticles,while N atoms in the RGO enhance the resulting photoactivity under a long wavelength range(>510 nm).The findings provide a potential approach to promote the photocatalytic properties of graphene-based composite photocatalysts with the low-energy incident photons.

关键词： graphene surface functional group N doping coupling photocatalyst

Reversed configuration of photocatalyst to exhibit improved properties of basic processes compared to conventional one

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Science China Chemistry 2020年第6期63卷 771-776页

作者： Juhong Lian Yu Qi Yunfeng Bao Zixi Yin Yang Zhang Nengcong Yang Naijia Guan Shengye Jin Landong Li Fuxiang Zhang State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian 116023China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials(iChEM) Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Performances of semiconductor photocatalysts are integrally determined by efficiencies of basic processes such as light absorption,charge separation and surface catalysis,but conventional configurations of photocatalysts normally suffers from the competition of light absorption originating from cocatalyst deposition and limited interface charge separation between the photocatalyst and *** we give the first proof-of-concept illustration that a reversed configuration of photocatalysts with a core/shell structure of microsized Mo2N cocatalysts and nanosized CdS photocatalysts,which exhibits superior solar hydrogen production to the conventional configuration with nanosized Mo2N cocatalysts deposited on the surface of CdS *** is revealed that the reversed configuration outperforms the conventional one in all areas of light absorption,charge separation and surface ***,the special core/shell structure introduced here can well avoid the competition of light absorption by cocatalysts and make an effective confinement effect to promote the surface catalysis of *** finding provides an alternative strategy to improve performances of photocatalysts.

关键词： photocatalyst nitride semiconductor renewable hydrogen core/shell

Single Pt atom decorated graphitic carbon nitride as an efficient photocatalyst for the hydrogenation of nitrobenzene into aniline

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Nano Research 2019年第8期12卷 1817-1823页

作者： Tianwei He Chunmei Zhang Lei Zhang Aijun Du School of Chemistry Physics and Mechanical EngineeringScience and Engineering FacultyQueensland University of TechnologyGardens Point CampusBrisbaneQLD 4001Australia

The hydrogenation of nitrobenzene into aniline is one of industrially important reactions, but still remains great challenge due to the lack of highly active, chemo-selective and eco-friendly catalyst. By using extensive density functional theory (DFT) calculations, herein we predict that single Pt atom decorated g-C3N4 (Pt@g-C3N4) exhibits excellent catalytic activity and selectivity for the conversion of nitrobenzene into aniline under visible light. The overall activation energy barrier for the hydrogenation of nitrobenzene on single atom Pt@g-C3N4 catalyst is even lower than that of the bare Pt(111) surface. The dissociation of N-0 bonds on single Pt atom is triggered by single hydrogen atom rather than double hydrogen atoms on the Pt(111) surface. Moreover, the Pt@g-C3N4 catalyst exhibits outstanding chemoselectivity towards the common reducible substituents, such as phenyl,-C=C,-C = C and -CHO groups during the hydrogenation. In addition, the doped single Pt atom can significantly enhance the photoconversion efficiency by broadening the light absorption of the pristine g-C3N4 to visible light region. Our results highlight an interesting and experimentally synthesized single-atom photocatalyst (Pt@g-C3N4) for efficient hydrogenation of nitrobenzene to aniline under a sustainable and green approach.

关键词： chemoselective hydrogenation single-atom catalyst photocatalyst nitrobenzene

Carbon quantum dots/Bi_(4)O_(5)Br_(2) photocatalyst with enhanced photodynamic therapy:killing of lung cancer(A549)cells in vitro

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Rare Metals 2022年第1期41卷 132-143页

作者： Bing He Hai-Yan Jin Ya-Wen Wang Cai-Mei Fan Yun-Fang Wang Xiao-Chao Zhang Jian-Xin Liu Rui Li Jue-Wen Liu College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China Department of Chemistry University of WaterlooWaterlooON N2L 3G1Canada

Inorganic photocatalysts have been regarded as a promising candidate in the domain of tumor photodynamic therapy(PDT)due to their inspirational photocatalytic *** this study,a Bi_(4)O_(5)Br_(2)photocatalyst was synthesized and it exhibited effective photo-killing activity of A549 cells(a human lung carcinoma epithelial cell line)in *** this basis,we modified Bi_(4)O_(5)Br_(2)with carbon quantum dots(CQDs)via a hydrolysis method at room temperature,which resulted in an improved photo-killing effect of Bi_(4)O_(5)Br_(2)to A549 *** samples and the interaction between samples and cells were fully *** has been found that the loading of CQDs on Bi_(4)O_(5)Br_(2)can reduce the hydration ratio,increase the cellular uptake and improve the photogenerated reactive oxygen species(ROS)as compared with pristine Bi_(4)O_(5)Br_(2).Electron spin resonance(ESR)analysis and radical-trapping experiments manifested that the ROS contributed to PDT may be·O^(2-)and ·*** study may provide a useful strategy to ameliorate the penetrability,cell compatibility and PDT effect upon cancer cells of other inorganic photocatalysts.

关键词： CQDs/Bi_(4)O_(5)Br_(2) photocatalyst PDT A549 cell Reactive oxygen species