文献类型：期刊文献

英文题名：Photocatalytic performance of N-doped Tio2 adsorbed with fe 3+ ions under visible light by a redox treatment

作者：Xing, Mingyang[1]; Zhang, Jinlong[1]; Chen, Feng[1]

机构：[1] Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China UniVersity of Science and Technology, 130 Meilong Road, Shanghai 200237, China

年份：2009

卷号：113

期号：29

起止页码：12848

外文期刊名：Journal of Physical Chemistry C

收录：EI(收录号：20093212245646)

语种：英文

外文关键词：Doping (additives) - Solutions - Photocatalysis - Aromatic compounds - Fourier transform infrared spectroscopy - Sodium Borohydride - Catalysts - Light - Hematite - X ray photoelectron spectroscopy - Titanium dioxide - X ray diffraction

摘要：A simple method to prepare the N-TiO2 adsorbed with Fe +3 ions only on the surface of catalysts and modify the catalysts by a redox treatment (NaBH4 reduction and air oxidation treatment) was proposed. The samples were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy, FTIR, X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron micrograph (HRTEM). The photocatalytic activities of the samples were evaluated for degradation of methylene blue (MB) in aqueous solutions under visible light (lambda > 420 nm). The results of XRD, FTIR, XPS, and HRTEM analysis indicated that the structure of Fe compounds changed from Fe2O3 to γ-FeOOH after redox treatment. Compared to N-TiO2 with Fe+3 ions, the catalysts after redox treatment showed higher photoactivity under visible light, and the formation of γ-FeOOH was responsible for the improvement of photocatalytic activity. Furthermore, to the catalysts after redox treatment, the mechanism for degradation of MB under visible light is an opening of a central aromatic ring attacked by OHbull;combined with a process of γ-FeOOH photoreductive dissolution. ?2009 American Chemical Society.