期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 23, 页码 6961-6968出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta10511c
关键词
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资金
- National Natural Science Foundation of China [51272070, 21031001, 20971040, 21001042, 21101060, 21201058]
- Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Education of China [708029]
- China Postdoctoral Science Special Foundation [2012T50270]
- Special Fund of Technological Innovation Talents in Harbin City [2012RFQXG111]
Visible-light-induced self-cleaning properties of Bi2MoO6/TiO2 bilayer films have been realized by controlling the synthesis of hierarchical flake-like Bi2MoO6 on TiO2 nanoparticle film substrates by a solvothermal process. By tuning the reaction time, we could facilely prepare Bi2MoO6/TiO2 bilayer films with the desired surface morphology. UV-visible diffuse reflectance spectroscopy analysis indicated that the Bi2MoO6/TiO2 bilayer films can extend their absorption edges to the visible light region, and showed gradually enhanced visible light absorption because of the increase of Bi2MoO6 content and surface morphological change from flat to hierarchical flake-like structure. The hierarchical flake-like Bi2MoO6/TiO2 bilayer film showed more significant visible light self-cleaning performance than that of single Bi2MoO6 and TiO2 films. It could be attributed to the synergistic effect of surface hierarchical structure with large surface area, superhydrophilicity, and effective electron-hole separations at the interfaces of the two semiconductors, which was confirmed by surface photovoltage spectroscopy (SPS), photoluminescence (PL) and electrochemical tests.
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