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

被引：25
|
作者：
Wang, Liugang [1 ]
Zhang, Junying [1 ]
Li, Chunzhi [1 ]
Zhu, Hailing [2 ]
Wang, Wenwen [1 ]
Wang, Tianmin [1 ]
机构：
[1] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
[2] Weifang Coll, Dept Phys, Shandong Prov Key Lab Multiphoton Entanglement &, Weifang 261061, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2011年 / 27卷 / 01期
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Thin films; TiO2; Bi2O3; microgrid; Photocatalysis;
D O I：
10.1016/S1005-0302(11)60026-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：59 / 63
页数：5
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