Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (01): 23-27.doi: 10.3866/PKU.WHXB20010105

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Preparation and Photocatalytic Properties of Nanometer SnO2@TiO2

Yan Xiu-Ru;Li Xiao-Hong;Huo Ming-Liang;Guo Wei-Wei;Gong Yong-Jin   

  1. Department of Chemistry,School of Science,Tianjin University,Tianjin 300072
  • Received:2000-03-31 Revised:2000-06-26 Published:2001-01-15
  • Contact: Yan Xiu-Ru

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