J. Mater. Sci. Technol. ›› 2011, Vol. 27 ›› Issue (1): 59-63.

• Research Articles • 上一篇    下一篇

Synthesis, Characterization and Photocatalytic Activity of TiO2 Film/Bi2O3 Microgrid Heterojunction

Liugang Wang1,Junying Zhang2,Chunzhi Li3,Hailing Zhu4,Wenwen Wang5   

  1. 1. School of Physics and Nuclear Energy Engineering, Beihang University
    2. School of Science, Beihang University, Beijing 100191, P. R. China
    3. 1. School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, P. R. China
    4. 2. Shandong Provincial Key Laboratory of Multi-photon Entanglement and Manipulation， Department of Physics, Weifang College, Weifang
    5. 1. School of Physics and Nuclear Energy Engineering, Beihang University, Beijing
  • 收稿日期:2010-05-27 修回日期:2010-09-04 出版日期:2011-01-28 发布日期:2011-01-30
  • 通讯作者: Liugang Wang
  • 基金资助:

    国家自然基金;国家863;国家基础研究

Synthesis, Characterization and Photocatalytic Activity of TiO2 Film/Bi2O3 Microgrid Heterojunction

Liugang Wang, Junying Zhang, Chunzhi Li, Hailing Zhu, Wenwen Wang, Tianmin Wang   

  1. 1) School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
    2) Shandong Provincial Key Laboratory of Multi-photon Entanglement and Manipulation Department of Physics, Weifang College, Weifang 261061, China
  • Received:2010-05-27 Revised:2010-09-04 Online:2011-01-28 Published:2011-01-30
  • Contact: Liu-Gang WANG
  • Supported by:

    the National High Technology Research and Development Program of China under Grant 2009AA03Z428, the National Natural Science Foundation of China under Grant No. 50872005, and the National Basic Research Program of China under Grant 2007CB613306

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摘要： TiO2 film modified by Bi2O3 microgrid arrays was successfully fabricated using a microsphere lithography method. The structure and morphology of TiO2 film, Bi2O3 film and TiO2 film/Bi2O3 microgrid heterojunction were characterized through X-ray diffraction, atomic force microscopy and scanning electron microscopy. The optical transmittance spectra and the photocatalytic degradation capacity of these samples to rhodamine B were determined via ultraviolet–visible spectroscopy. The results indicated that the coupled system showed higher photocatalytic activity than pure TiO2 and Bi2O3 films under xenon lamp irradiation. The enhancement of the photocatalytic activity was ascribed to the special structure, which could improve the rate of charge-carrier separation and extend the response range of TiO2 film from ultraviolet to visible region.

关键词: Thin films, TiO2, Bi2O3 microgrid, Photocatalysis

Abstract: TiO2 film modified by Bi2O3 microgrid array was successfully fabricated by using a microsphere lithography method. The structure and morphology of TiO2 film, Bi2O3 film and TiO2 film/Bi2O3 microgrid heterojunction were characterized through X-ray diffraction, atomic force microscopy and scanning electron microscopy. The optical transmittance spectra and the photocatalytic degradation capacity of these samples to rhodamine B were determined via ultraviolet-visible spectroscopy. The results indicated that the coupled system showed higher photocatalytic activity than pure TiO2 and Bi2O3 films under xenon lamp irradiation. The enhancement of the photocatalytic activity was ascribed to the special structure, which could improve the separation of photo-generated electrons and holes, enlarge the surface area and extend the response range of TiO2 film from ultraviolet to visible region.

Key words: Thin films, TiO2, Bi2O3 microgrid, Photocatalysis