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Acta Physico-Chimica Sinica  2000, Vol. 16 Issue (11): 997-1002    DOI: 10.3866/PKU.WHXB20001108
Preparation,Characterization and Photo-catalytic Behavior of WO3/TiO2 Nanopowder
 Li Fang-Bai, Gu Guo-Bang, Li Xin-Jun, Wan Hong-Fu
Guangdong Institute of Eco-Environment and Soil Science,Leyiju,Guangzhou 510650|College of Chemical engineering,South China University of Technology,Wushan,Guangzhou 510642
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WO3/TiO2 samples were prepared by sol-gel process and characterized by means of XRD、LRS、TEM、DRS、BET、XPS.It has been shown that the mean crystal diameter and mean particle diameter of WO3/TiO2 samples decreased while the percent of anatase and specific surface area increased owing to the doping of WO3.New LRS peaks presented at 797,967 and 969cm-1,respectively,when the concentration of doped WO3 was 2%,5%and 8%.The reflectance percentate of WO3/TiO2 samples was less than that of pure TiO2 in the range of 380-460nm.The XPS fitting analyses showed that there were W6+、W5+、W4+ and Ti4+、Ti3+ in the lattice of WO3/TiO2.Being a model reaction,the photo-catalytic degradation of methylene blue was investigated in TiO2 and WO3/TiO2 nanopowder suspension irradiated by high-pressure mercury lamp.As a result,the addition of WO3 to TiO2 greatly enhanced its photo-catalytic behavior,and the optimum concentration of WO3 in TiO2 was 2%(molar percent).Moreover,the relationship between photo-activity and the physical and chemical properties of the samples have been discussed.

Key wordsPhoto-catalysis      Titanium dioxide      Tungsten oxide      Coupled semiconductor      Methylene blue     
Received: 29 February 2000      Published: 15 November 2000
Corresponding Authors: Li Fang-Bai     E-mail:
Cite this article:

Li Fang-Bai, Gu Guo-Bang, Li Xin-Jun, Wan Hong-Fu. Preparation,Characterization and Photo-catalytic Behavior of WO3/TiO2 Nanopowder. Acta Physico-Chimica Sinica, 2000, 16(11): 997-1002.

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