文献类型：期刊文献

英文题名：Preparation of Fe³⁺-doped TiO₂ catalysts by controlled hydrolysis of titanium alkoxide and study on their photocatalytic activity for methyl orange degradation

作者：Tong, Tianzhong[1,2];Zhang, Jinlong[1,2];Tian, Baozhu[1,2];Chen, Feng[1,2];He, Dannong[3]

机构：[1]E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, PR, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, PR, Peoples R China;[3]Shanghai Natl Engn Res Ctr Nanotechnol, Shanghai 200237, Shanghai, Peoples R China

年份：2008

卷号：155

期号：3

起止页码：572

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000257261600022)】；

语种：英文

外文关键词：anatase; visible light; photodegradation; esterification reaction; Fe3+ doping

摘要：Fe3+-doped TiO2 (Fe-TiO2) porous microspheres were prepared by controlled hydrolysis of Ti(OC4H9)(4) with water generated "in situ" via an esterification reaction between acetic acid and ethanol, followed by hydrothermal treatment. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), atomic absorption flame emission spectroscopy (AAS), electron paramagnetic resonance (EPR) spectrum, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), and nitrogen adsorption-desorption methods. All of the undoped TiO2 and Fe-TiO2 samples exclusively consist of primary anatase crystallites, which further form porous microspheres with diameters ranging from 150 to 500 nm. The photocatalytic activity of Fe-TiO2 catalysts was evaluated from the photodegradation of methyl orange (MO) aqueous solution both under UV and visible light irradiation. Fe3+ doping effectively improves the photocatalytic activity under both UV light irradiation and visible light irradiation with an optimal doping concentration of 0.1 and 0.2%, respectively. The photocatalytic mechanisms of Fe-TiO2 catalysts were tentatively discussed. (C) 2007 Elsevier B.V. All rights reserved.