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Transactions of Nonferrous Metals Society of China 2010年第10期20卷 1944-1949页

作者：姚茂海唐有根张丽杨海华阎建辉 School of Chemistry and Chemical Engineering Central South University Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology

CuO was synthesized by thermal decomposition of Cu(NO3)2·3H2O at various temperatures and characterized by powder X-ray diffractometry(XRD) as well as scanning electron microscopy(SEM).The effects of calcination temperature,category of sacrificial reagent,initial sacrificial reagent concentration,and Ag loading content on the photocatalytic activity of the as-obtained CuO sample were *** results show that the as-obtained CuO exhibits high activity for photocatalysis of H2 evolution reaction(HER) in oxalic acid solution under simulated sunlight *** highest photocatalytic activity of the as-obtained CuO was achieved at the calcination temperature of 1000℃,and oxalic acid was used as the sacrificial reagent with the concentration 0.05 mol/L.H2 evolution rate is as high as 2.98 mmol/(h·g) with 2%(mass fraction) loaded *** possible photocatalytic reaction mechanism on the CuO photocatalyst for HER in oxalic acid solution was also discussed.

关键词： copper oxide (CuO) hydrogen evolution reaction (HER) photocatalytic activity oxalic acid simulated sunlight

photocatalytic activity of perovskite SrTiO_(3)catalysts doped with variable rare earth ions

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Rare Metals 2021年第5期40卷 1077-1085页

作者： Yue-Xin Song Wen-Qi Ma Jing-Jing Chen Jiao Xu Zhi-Yong Mao Da-Jian Wang Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Key Laboratory of Display Materials and Photoelectric Devices Ministry of EducationTianjin University of TechnologyTianjin 300384China

In this work,15 types of rare earth(Re)ions,including Y^(3+),La^(3+),Ce^(3+),Pr^(3+),Nd^(3+),Sm^(3+),Eu^(3+),Gd^(3+),Tb^(3+),Dy^(3+),Ho^(3+),Er^(3+),Tm^(3+),Yb^(3+)and Lu^(3+)doped perovskite SrTiO_(3)powders were synthesized by solgel *** influence of Re ions doping on the crystal structure,morphology and optical property as well as the photocatalytic activity for the photodegradation of rhodamine B(RhB)was investigated in detail when the synthesized Re ions doped SrTiO_(3)powders were served as *** presented results revealed that the crystal structure is invariable,whereas the morphology and the optical bandgap are variable for the resultant SrTiO_(3)powders when different Re ions were incorporated into the SrTiO_(3)*** relatedness between the morphology,optical property and photocatalytic activity of the synthesized SrTiO_(3)catalysts doped with variable Re ions were analyzed deeply,providing an insight into the influence factors on the photocatalytic activity of catalysts.

关键词： SrTiO_(3) Rare earth ions Doping photocatalytic activity

photocatalytic activity of cerium-doped mesoporous TiO_2 coated Fe_3O_4 magnetic composite under UV and visible light

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Journal of Rare Earths 2012年第4期30卷 355-360页

作者：石中亮杨兴满姚淑华 School of Applied Chemistry Shenyang University of Chemical Technology

A novel kind of magnetically separable photocatalyst of cerrium-doped mesoporous titanium dioxide coated magnetite （Ce/MTiO2/ Fe3O4） was prepared and its activities under UV and visible light were reported. The catalysts with Ce/MTiO2 shell and Fe3O4 core were prepared by coating photoactive Ce/MTiO2 onto a magnetic Fe3O4 core through the hydrolysis of tetrabutyltitanate （Ti（OBu）4, TBT） with precursors of ammonium ceric nitrate and TBT in the presence of Fe3O4 particles. The MTiO2 shell was for photocatalysis, the Fe3O4 core was for separation by the magnetic field and the doped Ce was used to enhance the photocatalytic activity of MTiO2. The morphological, structural and optical properties of the prepared samples were characterized by Bnmauer-Emmett-Teller （BET） surface area, transmission electron microscopy （TEM）, X-ray diffraction （XRD） and UV-vis absorption spectroscopy. The effect of cerrium-doped content on the photocatalytic activity was studied and the result revealed that 0.5 mol.% Ce/MTiO2/Fe3O4 exhibited highest photoactivity. The photocatalytic activities of obtained photocatalysts under UV and visible light were estimated by measuring the degradation rate of methylene blue （MB, 50 mg/L） in an aqueous solution. The results showed that the prepared photocatalyst was activated by visible light and used as effective catalyst in photooxi- dation reactions. In addition, the possibility of cyclic usage of the prepared photocatalyst was also confirmed. Moreover, Ce/MTiO2 was tightly bound to Fe3O4 and could be easily recovered from the medium by an external magnetic filed. So, the photocatalyst can be reused without any mass loss. It can therefore be potentially applied for the treatment of water contaminated by organic pollutants.

关键词： mesoporous titanium dioxide magnetite cerium-doping photocatalytic activity rare earths

photocatalytic activity of Mo+Fe Co-doped Titanium Dioxide Nanoparticles Prepared by Sol-Gel Method

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Journal of Wuhan University of Technology(Materials Science) 2013年第1期28卷 44-47页

作者：刘海林熊锐 Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and TechnologyWuhan University

Mo＋Fe co-doped TiO2 nano powders were synthesised by sol-gel method. X-ray diffraction and transmission electronic microscopy morphologies showed that the Mo＋Fe co-doped TiO2 nano powders were pure anatase phase, with the average crystallite size around 20 nm. UV-Vis and photocatalic activity measurements show that this Mo＋Fe co-doped TiO2 can absorb visible light, have higher separation efficiency of photoinduced electrons and holes, and possess higher photocatalytic activity compared with anatase TiO2. The enhanced photocatalytic activity of Mo＋Fe co-doped TiO2 verified that doping by transition metal ions can also modify the energy band and reduce the recombination centers in TiO2.

关键词： Mo+Fe co-doped Ti02, anatase photocatalytic activity

photocatalytic activity of bauxite-tailings supported nano-TiO_2

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Journal of Central South University 2010年第4期17卷 755-759页

作者：卢清华胡岳华王梦 School of Resources Processing and Bioengineering Central South University

TiO2/bauxite-tailings （TiO2/BTs） composites were prepared via a chemical liquid deposition method and characterized by X-ray diffractometry （XRD）, scanning electronic microscopy （SEM） and N2 adsorption analysis. The photocatalytic performance of TiO2/BTs composites was evaluated with UV-Vis spectrophotometer following the changes of phenol concentration under different illumination time. Effects of the calcination temperature, the pH and the cycles on the photocatalytic activity of TiO2/BTs composites were investigated. The composites calcined at 500 and 600 ℃ exhibit the best photocatalytic performance, and the phenol degradation ratios reacting for 40 and 160 rain reach 35% and 78% respectively under the same conditions, higher than those of 29% and 76% of the Degussa P25（TiO2）. The ability of TiO2/BTs500 （BTs500 represents bauxite-tailings calcined at 500 ℃） composites to degrade phenol increases with decreasing pH.

关键词： TiO2 bauxite-tailings phenol photocatalytic activity

photocatalytic activity of TiO_(2) Coatings Fabricated on Al_(2)O_(3) by Mechanical Coating Technique

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Journal of Wuhan University of Technology(Materials Science) 2021年第1期36卷 1-5页

作者： WU Kaixia ZHA Wusheng CHEN Xiuli College of Intelligent Manufacturing Jincheng CollegeSichuan UniversityChengdu 611731China College of Material Science&Engineering Xihua UniversityChengdu 610039China

The titanium coatings were prepared on Al_(2)O_(3) balls by mechanical coating technique (MCT),and then the coatings were oxidized to titanium oxides(TiO_(2)) films at 300-600 ℃.The effects of different milling time and oxidation temperature on thickness of films were *** composition and microstructure of the films were analyzed by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS).The results show that the thickest coatings with an average thickness of 20 μm were obtained at the milling time of 15 *** addition,with the increase of the oxidation temperature,the oxidation of the film is *** the milling time is 15 h,the oxidation temperature is 500 ℃,and the addition of photocatalyst is 1 g/*** films have the best photocatalytic performance when the degradation rate of methyl orange solution reaches the maximum value of 74.9 %,and the films have a good reusability.

关键词： mechanical coating technique photocatalytic activity TiO_(2) milling time oxidation temperature

Synthesis and photocatalytic activity of One-dimensional ZnO-Zn2SnO4 Mixed Oxide Nanowires

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Chinese Journal of Chemical Physics 2008年第1期21卷 81-86页

作者： Xue-lian Bai Nan Pan Xiao-ping Wang Hai-qian Wang Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technologyof China Hefei 230025 China

Mixed oxide photocatalysts, ZnO-Zn2SnO4 （ZnO-ZTO） nanowires with different sizes were prepared by a simple thermal evaporation method. The ZnO-ZTO nanowires were characterized with a scanning electron microscope, X-ray diffraction, high-resolution transmission electron microscopy, energy-dispersive spectrom- eter, and X-ray photoelectron spectra. The photocatalytic activity of the ZnO-ZTO mixed nanowires were studied by observing the photodegradation behaviors of methyl orange aqueous solution. The results suggest that the ZnO-ZTO mixed oxide nanowires have a higher photocatalytic activity than pure ZnO and Zn2SnO4 nanowires. The photocatalyst concentration in the solution distinctly affects the degradation rate, and our results show that higher photodegradation efficiency can be achieved with a smaller amount of ZnO-ZTO nanowire catalyst, as compared to the pure ZnO and ZTO nanowires. Moreover, the photocatalytic activity can also be enhanced by reducing the average diameter of the nanowires. The activity of pure ZnO and ZTO nanowires are also enhanced by physically mixing them. These results can be explained by the synergism between the two semiconductors.

关键词： ZnO Zn2SnO4 Nanowire photocatalytic activity Photodegradation

photocatalytic activity of Hierarchical Flower-Like TiO_(2) Superstructures with Dominant {001} Facets

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催化学报 2011年第4期32卷 525-531页

作者： XIANG Quanjun YU Jiaguo State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeLChina

The fabrication of well defined hierarchical structures of anatase TiO_(2) with a high percentage of reactive facets is of great importance and *** flower-like TiO_(2) superstructures(HFTS)self-assembled from anatase TiO_(2) nanosheets with exposed{001}facets(up to 87%)were synthesized by a simple alcohothermal strategy in a HF-H_(2)O-C_(2)H_(5)OH mixed solution using titanate nanotubes as *** samples were characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy,and N2 adsorption-desorption *** photocatalytic activity was evaluated by the photocatalytic oxidation decomposition of acetone in air and methyl orange in aqueous solution under UV *** photocatalytic activity of HFTS was much higher than that of commercial Degussa P25 and tabular-shaped anatase TiO_(2) obtained using pure water as the synthesis *** enhancement in photocatalytic activity was related to several factors,including the hierarchically porous structure,exposed{001}facets,and increased light harvesting *** HFTS was also of interest for use in solar cells,photocatalytic H_(2) production,optoelectronic devices,sensors,and catalysis.

关键词： titanium dioxide {001}facet hierarchical flower-like titanium dioxide superstructure photocatalytic activity acetone methyl orange

Construction of oxygen-vacancies-rich S-scheme BaTiO_(3)/red phosphorous heterojunction for enhanced photocatalytic activity

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Journal of Materials Science & Technology 2023年第25期156卷 217-229页

作者： Yuhua Ma Xiadiye Aihemaiti Kezhen Qi Shiyin Wang Yanjie Shi Zhuanhu Wang Minghe Gao Fuhe Gai Yulian Qiu College of Chemistry and Chemical Engineering Xinjiang Normal UniversityUrumqi 830054China Xinjiang Key Laboratory of Energy Storage and Photoelectrocatalytic Materials Xinjiang Normal UniversityUrumqi 830054China College of Pharmacy Dali UniversityDali 671000China

The S-scheme heterojunctions can effectively separate photogenerated electrons and holes,retain their high redox capacity,and provide great prospects for enhancing the photocatalytic activity of the composites in different ***,S-scheme heterojunction photocatalytic materials were rationally designed and prepared by a simple hydrothermal method between narrow-bandgap red phosphorus(HRP)and wide-bandgap BaTiO_(3)(BTO)*** to the effective charge separation and redox ability from the S-scheme mechanism and oxygen vacancies,BTO/HRP exhibited good photoelectrochemical and photocatalytic degradation *** photoreaction tests demonstrated that BTO/HRP had high practicality in the removal of pollutants from wastewater;its photodegradation rate of Rhodamine B reached 3.029×10^(−1) min^(−1) in 12 min;and it could inactivate 1.8×10^(9) CFU/mL of *** in 1 h,with an antibacterial rate of 99.8%.This paper provided a promising photocatalyst for pollutant removal and a new strategy for the fabrication of efficient RP-based photocatalytic materials.

关键词： S-scheme heterojunction Red phosphorous BaTiO3 photocatalytic activity

Preparation and photocatalytic activity of La^(3+) and Eu^(3+) co-doped TiO_2 nanoparticles: photo-assisted degradation of methylene blue

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Journal of Rare Earths 2011年第8期29卷 746-752页

作者：史慧贤张天永王红亮 School of Chemical Engineering and Technology Tianjin University Department of Nuclear Medicine The First Affiliated Hospital of Sun Yat-sen University

Rare earth ions La3＋ and Eu3＋ co-doped TiO2 photocatalyst （La-Eu/TiO2） was prepared by sol-gel method, and characterized by various techniques such as X-ray diffraction （XRD）, specific surface area and porosity （BET and BJH）, scanning electron microscopy （SEM）, high resolution transmission electron microscopy （HRTEM）, UV-vis diffuse reflectance spectroscopy （DRS） and X-ray photoelectron spectroscopy （XPS）. The photocatalytic activity of the La-Eu/TiO2 was evaluated by the degradation of methylene blue （MB） under UV light irradiation. The catalyst had a relatively uniform particle diameter distribution in the range of 40–60 nm. When calcining at 600℃, the XRD patterns of La-Eu/TiO2 indicated the anatase phase, while the XPS patterns showed the Ti4＋, La3＋ and Eu3＋ ions existence. The DRS spectra showed red shift in the band-gap transition. The experimental results of MB degradation demonstrated that the photocatalytic activity of La-Eu/TiO2 was significantly enhanced due to better separation of photogenerated electron-hole pairs.

关键词： lanthanum europium titania photocatalytic activity degradation methylene blue rare earths