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

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

• Thin Film and Coatings • Previous Articles Next Articles

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

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

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

Abstract

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

Liugang Wang Junying Zhang Chunzhi Li Hailing Zhu Wenwen Wang. Synthesis, Characterization and Photocatalytic Activity of TiO₂ Film/Bi₂O₃ Microgrid Heterojunction[J]. J Mater Sci Technol, 2011, 27(1): 59-63.

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

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