文献类型：期刊文献

英文题名：Preparation and characterization of TiO2 photocatalysts by Fe3+ doping together with Au deposition for the degradation of organic pollutants

作者：Wu, Yongmei[1]; Zhang, Jinlong[1]; Xiao, Ling[1]; Chen, Feng[1]

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

年份：2009

卷号：88

期号：3-4

起止页码：525

外文期刊名：Applied Catalysis B: Environmental

收录：EI(收录号：20091812066689)

语种：英文

外文关键词：Organic pollutants - Electrons - Gold - Photocatalysis - Photocatalysts - Reflection - Emission spectroscopy - Light absorption - Particle size - Spectrum analysis - X ray diffraction - Light - Solutions - X ray photoelectron spectroscopy - High resolution transmission electron microscopy - Photodegradation

摘要：Fe3+ doped TiO2 deposited with Au (Au/Fe-TiO2) was successfully prepared with an attempt to extend light absorption of TiO2 into the visible region and reduce the rapid recombination of electrons and holes. The samples were characterized by X-ray diffraction (XRD), N2 physical adsorption, Raman spectroscopy, atomic absorption flame emission spectroscopy (AAS), UV-vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectra. The photocatalytic activities of the samples were evaluated for the degradation of 2,4-chlorophenol in aqueous solutions under visible light (λ > 420 nm) and UV light irradiation. The results of XRD, XPS and high-resolution transmission electron microscopy (HRTEM) analysis indicated that Fe3+ substituted for Ti4+ in the lattice of TiO2, Au existed as Au0 on the surface of the photocatalyst and the mean particle size of Au was 8 nm. Diffuse reflectance measurements showed an extension of light absorption into the visible region for Au/Fe-TiO2, and PL analysis indicated that the electron-hole recombination rate has been effectively inhibited when Au deposited on the surface of Fe-doped TiO2. Compared with Fe doped TiO2 sample and Au deposited TiO2 sample, the Au/Fe-TiO2 photocatalyst exhibited excellent visible light and UV light activity and the synergistic effects of Fe3+ and Au was responsible for improving the photocatalytic activity. ? 2008 Elsevier B.V. All rights reserved.