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

材料科学技术（英文）, 2011, 27(1): 59-63.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

2.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

3.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

4.Shandong Provincial Key Laboratory of Multi-photon Entanglement and Manipulation Department of Physics,Weifang College, Weifang 261061, China

5.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

6.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

基金项目: the National Basic Research Program of China(2007CB613306) the National High Technology Research and Development Progran of China(2009AA03Z428) the National Natural Science Foundation of China(50872005)

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

Liugang Wang ^1, , Junying Zhang ^2, , Chunzhi Li ^3, , Hailing Zhu ^4, , Wenwen Wang ^5, , Tianmin Wang ^6,

1.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

2.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

3.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

4.Shandong Provincial Key Laboratory of Multi-photon Entanglement and Manipulation Department of Physics,Weifang College, Weifang 261061, China

5.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

6.School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

Keywords： Thin films

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.

参考文献

[1]	X.Z.Li;F.B.Li;C.L.Yang;W.K.Ge .Photocatalytic activity of WO_x-TiO_2 under visible light irradiation[J].Journal of Photochemistry and Photobiology, A. Chemistry,2001(2/3):209-217.
[2]	J.Wang;S.Uma;K.J.Klabunde .Visible light photocatalysis in transition metal incorporated titania-silica aerogels[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2004(2):151-154.

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

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