Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (09): 2169-2174.doi: 10.3866/PKU.WHXB201207041

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Fabrication of Bi2O3/Bi2O3 Nanotube Arrays with High Visible-Light Photocatalytic Activity by Impregnation-Decomposition Method

DAI Gao-Peng, LIU Su-Qin, PENG Rong, LUO Tian-Xiong   

  1. School of Chemical Engineering and Food Science, Hubei University of Arts and Science, Xiangyang 441053, Hubei Province, P. R. China
  • Received:2012-05-28 Revised:2012-07-03 Published:2012-08-02
  • Supported by:

    The project was supported by the Research Program of Hubei Province Department of Education, China (T201215, Q20122507).

Abstract:

Bi2O3/TiO2 nanotube arrays (NTs) were prepared by depositing Bi2O3 nanoparticles (NPs) onto the tube wall of self-organized TiO2 NTs using an impregnation-decomposition method. Chemical composition of the resulting Bi2O3/TiO2 NTs was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-visible (UV-Vis) diffuse reflectance spectroscopy. Photocatalytic activity was evaluated by degradation of aqueous methyl orange (MO) solution under visible-light irradiation (λ>400 nm). The Bi2O3 nanoparticles were found to be uniformly deposited into the nanotubes. Bi2O3/TiO2 NTs exhibited much higher visible-light activity than pure Bi2O3 films and N-TiO2 NTs, which was attributed to synergistic effects of the strong visible-light absorption of Bi2O3/TiO2 NTs and the heterojunction formed between Bi2O3 and TiO2.

Key words: Bi2O3/TiO2 nanotube array, Visible light, Photocatalysis, Heterojunction, Synergetic effect

MSC2000: 

  • O644