期刊
APPLIED SURFACE SCIENCE
卷 263, 期 -, 页码 382-388出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2012.09.066
关键词
TiO2 microspheres; Fe-incorporation; Impregnating-calcination method; Photocatalytic activity; Visible-light
类别
资金
- National Natural Science Foundation of China [51202136]
- Natural Science Fundation of Shaanxi [2011JQ6011]
- Natural Science Fundation of SUST [ZX11-14]
- Graduate Innovation Found of Shaanxi University of Science and Technology
Fe incorporated TiO2 microspheres (Fe-TiO2) were prepared by integrating the sol-gel method and impregnating-calcination method. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV-vis diffuse reflectance spectroscopy indicated that alpha-Fe2O3 nanoparticles were deposited onto the TiO2 microspheres, and in the mean time, some Fe3+ ions were doped into TiO2 lattice. The absorption of Fe-TiO2 microspheres in the visible light region increased with the increasing of Fe content. Photoluminescence (PL) analyses further confirmed that Fe-incorporation effectively promoted the separation and transfer of photogenerated charge carriers, which can improve the photocatalytic activity of the samples. The photocatalytic activity of Fe-TiO2 microspheres was evaluated by the degradation of methylene blue aqueous solution under visible light irradiation. The results demonstrated that the Fe-TiO2 microspheres exhibited significantly enhanced photocatalytic activity compared with pure TiO2 microspheres. What is more, the charge-transfer processes in Fe-TiO2 were also discussed. (C) 2012 Elsevier B. V. All rights reserved.
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