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《Journal of Molecular Catalysis》 2009-02
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Low-temperature Preparation of Nanometer TiO_2 and Photo-degradation of Toxic Organic Pollutants

YANG Jing1,DENG An-ping1,HUANG Ying-ping1,FANG Yan-feng1,LIU Zhi-hong2,YANG Tan-ming3(1.Alan G.MacDiarmid Research Institute for Renewable Energy,Three Gorges University,Yichang,443002,China;2.College of Chemistry and Molecule Sciences,Wuhan University,Wuhan,430072,China;3.Key Laboralory of Catalysis and Materials Sccience of Hubei Province,South-Central University for Nationalities,Wuhan,430070,China)  
Nanometer TiO2 have been prepared at low temperature(180 ℃) by different methods.The photocatalysis degradation under UV(≤387 nm) of organic dye Rhodamine B(RhB) was used as probe reaction to evaluate the best method.For the purpose of the best degradation activity of organic dye,the best method used to prepare TiO2 at low temperature was optimal selected.The results show that the TiO2 prepared at low temperature(180 ℃) by Ti(SO4)2 in the method of steam heating is the best method.The physical and photocatalysis characteristics of high activity TiO2 were carried out using transmission electron mixroscopy(TEM),and X-ray diffraction(XRD) spectroscopy.In this paper,the influence of the crystalline phase transition,size of particles and of photo-catalytic degradation activity of TiO2 which have been prepared in different temperatures and time were discussed.The results show that the best reaction temperature is 180 ℃ and the best reaction time is 12 h were chosen out by the condition that the probe reaction has good photo-catalytic degradation effect under UV(≤387 nm).By UV-vis,FTIR and the measurement of TOC found that RhB can be degraded and mineralized under the TiO2 /UV system at pH=3.00.The mineralized rate of RhB was 93.2%.
【Fund】: 国家自然科学基金(批准号:20877048);; 国家重点基础研究发展计划(批准号:2003CB415006-3 2008CB417206);; 湖北省高等学校优秀中青年科技创新团队计划(No.T200703);; 催化材料湖北省重点实验室开放基金(No.CHCL07001)
【CateGory Index】: O643.36
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