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Acta Physico-Chimica Sinica  2001, Vol. 17 Issue (01): 23-27    DOI: 10.3866/PKU.WHXB20010105
Article     
Preparation and Photocatalytic Properties of Nanometer SnO2@TiO2
Yan Xiu-Ru;Li Xiao-Hong;Huo Ming-Liang;Guo Wei-Wei;Gong Yong-Jin
Department of Chemistry,School of Science,Tianjin University,Tianjin　300072
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Abstract  SnO2@TiO2 coated particles have been prepared with Ti(OC4H9)4 and SnO2•nH2O as precursors by coated on active surface.In order to improve the photocatalytic degradation activity of SnO2@TiO2 for DDVP,the conditions of preparation were studied and better photocatalytic activity was obtained.Its morphology and structure were characterized by XRD,SEM,TEM,XPS、IR and BET.The result indicated:That SnO2@TiO2 is composed of nanometer ranatase TiO2 and rutile SnO2,and the photocatalytic activities of SnO2@TiO2 are better than those of SnO2 and TiO2,the apparent rate constant k of the photocatalytic degradation of DDVP is related to the initial concentration of DDVP solution.The reaction is not a simple zeroorder reaction.

Key words： Sol-precipitation method      Nanometer      SnO2@TiO2      Photocatalytic degradation      DDVP     
Received: 31 March 2000      Published: 15 January 2001
Corresponding Authors: Yan Xiu-Ru     E-mail: guoweiwei@eyou.com.cn
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Yan Xiu-Ru;Li Xiao-Hong;Huo Ming-Liang;Guo Wei-Wei;Gong Yong-Jin. Preparation and Photocatalytic Properties of Nanometer SnO2@TiO2. Acta Physico-Chimica Sinica, 2001, 17(01): 23-27.

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http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20010105     OR     http://www.whxb.pku.edu.cn/Y2001/V17/I01/23

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