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Preparation of (Ti, Sn)O_2 Nano-Composite Photocatalyst by Supercritical Fluid Dry Combination Technology
作者姓名:Jingchang ZHANG  Qing LI and Weiliang CAO Institute of Modern Catalysis  The Key Laboratory of Science and Technology of Controllable Chemical Reactions  Ministry of Education  Beijing University of Chemical Technology  Beijing  China
作者单位:Jingchang ZHANG,Qing LI and Weiliang CAO Institute of Modern Catalysis,The Key Laboratory of Science and Technology of Controllable Chemical Reactions,Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China
基金项目:国家自然科学基金,国家高技术研究发展计划(863计划),the Doctoral Program of Higher Education,the financial support of this project
摘    要:A series of TiO2-SnO2 nano-sized composite photo-catalysts containing Sn (9.3%-30.1%) were prepared from TiCI4 and SnCl4·5H2O by using sol-gel, supercritical fluid dry and solid-phase reaction (SCFD) combination technology. Characterizations with X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FTIR) showed that, in addition to anatase type TiO2, a new active phase (Ti, Sn)O2 (with particle size of 2.0-4.3 nm) formed, and there were no SnO2 crystals observed in the range of the doping concentration studied. Photo-catalytic reaction of phenol was used as a model reaction to evaluate the catalytic activities of the obtained catalysts. Compared with pure TiO2 or Ti-Sn catalyst prepared with general sol-gel method, Ti-Sn nano-composite photo-catalyst thus obtained showed significant improvement in catalytic activity. The photo-catalytic degradation rate of phenol could reach as high as 93.5% after 7 h. The preparation conditions of the new phase (T

收稿时间:2004-05-28

Preparation of (Ti, Sn)O2 Nano-Composite Photocatalyst by Supercritical Fluid Dry Combination Technology
Jingchang ZHANG,Qing LI and Weiliang CAO Institute of Modern Catalysis,The Key Laboratory of Science and Technology of Controllable Chemical Reactions,Ministry of Education,Beijing University of Chemical Technology,Beijing ,China.Preparation of (Ti, Sn)O_2 Nano-Composite Photocatalyst by Supercritical Fluid Dry Combination Technology[J].Journal of Materials Science & Technology,2005,21(2):191-195.
Authors:Jingchang ZHANG  Qing LI  Weiliang CAO
Affiliation:Institute of Modern Catalysis, The Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
Abstract:A series of TiO2-SnO2 nano-sized composite photo-catalysts containing Sn (9.3%~30.1%) were prepared from TiCl4and SnCl4.5H2O by using sol-gel, supercritical fluid dry and solid-phase reaction (SCFD) combination technology.Characterizations with X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FTIR) showed that, in addition to anatase type TiO2, a new active phase (Ti, Sn)O2 (with particle size of 2.0~4.3 nm) formed, and there were no SnO2 crystals observed in the range of the doping concentration studied. Photo-catalytic reaction of phenol was used as a model reaction to evaluate the catalytic activities of the obtained catalysts. Compared with pure TiO2 or Ti-Sn catalyst prepared with general sol-gel method, Ti-Sn nanocomposite photo-catalyst thus obtained showed significant improvement in catalytic activity. The photo-catalytic degradation rate of phenol could reach as high as 93.5% after 7 h. The preparation conditions of the new phase (Ti, Sn)O2 were investigated and its catalytic mechanism was proposed. The photo-catalytic particles prepared using SCFD combination technology exhibited small particle size, large surface area and high activity.
Keywords:Anatase TiO2  (Ti  Sn)O2  Photo-catalytic  Supercritical fluid dry method  Solid-phase reaction
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