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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2009,Vol.25>> Issue(04)>> 617-623     doi: 10.3866/PKU.WHXB20090412         中文摘要
Visible Region Photocatalysis of Ce-Si/TiO2 Synthesized Using Sol-Gel-Hydrothermal Method
 CHEN Qi-Feng, JIANG Dong, XU Yao, WU Dong, SUN Yu-Han
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China; Graduate University of the Chinese Academy of Sciences, Beijing 100049, P. R. China
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Cerium and silica co-doped nanoscale TiO2 particles were synthesized froma complex compound system of tetrabutyl titanate (TBT), tetraethyl orthosilicate (TEOS) and cerium nitrate hexahydrate (CNH) at 140 ℃. The reaction was carried out in a Teflon-lined steel autoclave with water as the solvent using a sol-gel-hydrothermal method. The obtained materials were characterized by X-ray diffraction, nitrogen adsorption, transmission electron microscopy, UV-visible diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy as well as X-ray photoelectron spectroscopy. We found that all materials were in the anatase phase, even those calcined at 600 ℃, and that the samples possessed large surface areas. Furthermore, Si and Ce were successfully doped into the bulk TiO2. The photocatalytic activity of the doped material was determined by the degradation of Rhodamine B (RB) using visible light irradiation. Results showed that both Ce-doped TiO2 and Ce-Si co-doped TiO2 had better visible photoactivity than pure TiO2. These particles were all prepared using the same conditions. The highest photocatalytic activity for these samples was obtained using Ce/Ti and Si/Ti molar ratios of 0.010 and 0.10, respectively. These ratios are then considered to be the optimal doping dosages.



Keywords: Titania   Ce-Si co-doped   Sol-gel-hydrothermal method   Visible-photocatalysis   Rhodamine B  
Received: 2008-11-19 Accepted: 2008-12-17 Publication Date (Web): 2009-02-16
Corresponding Authors: XU Yao, XUN Zhu-Han Email: xuyao@sxicc.ac.cn;yhsun@sxicc.ac.cn


Cite this article: CHEN Qi-Feng, JIANG Dong, XU Yao, WU Dong, SUN Yu-Han. Visible Region Photocatalysis of Ce-Si/TiO2 Synthesized Using Sol-Gel-Hydrothermal Method[J]. Acta Phys. -Chim. Sin., 2009,25 (04): 617-623.    doi: 10.3866/PKU.WHXB20090412
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