文献类型：期刊文献

英文题名：Flame sprayed V-doped TiO2 nanoparticles with enhanced photocatalytic activity under visible light irradiation

作者：Tian, Baozhu[1,2]; Li, Chunzhong[1]; Gu, Feng[1]; Jiang, Haibo[1]; Hu, Yanjie[1]; Zhang, Jinlong[2]

机构：[1] Key Laboratory for Ultrafine Materials, Ministry of Education, School of Materials Science and Engineering, Meilong Road, Shanghai, 200237, China; [2] Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road, Shanghai, 200237, China

年份：2009

卷号：151

期号：1-3

起止页码：220

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20092212095825)

语种：英文

外文关键词：Electron spin resonance spectroscopy - Irradiation - Light - Gas adsorption - Spray pyrolysis - High resolution transmission electron microscopy - Oxide minerals - Photodegradation - Ultraviolet spectroscopy - Particle size - Aromatic compounds - Flame spraying - Photocatalysis - Photocatalysts - Nanoparticles - X ray diffraction - Absorption spectroscopy - Paramagnetic resonance

摘要：V-doped TiO2 (V-TiO2) nanoparticles were prepared by a simple one-step flame spray pyrolysis (FSP) technique. The obtained samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectra, UV-vis absorption spectroscopy, and nitrogen adsorption-desorption methods. Benefiting from the short residence time and high quenching rate during the flame spray process, V4+ ions are successfully incorporated into the crystal lattice of TiO2. It reveals that V doping favors the primary particle size growth as well as the increase of rutile content in the products. The photocatalytic activity of the V-TiO2 samples under UV and visible light irradiation were evaluate by the photocatalytic degradation of methylene blue (MB) and 2,4-dichlorophenol (2,4-DCP), respectively. It was found that V doping enhances the photocalytic activity under both UV and visible light irradiation. Especially, under visible light irradiation, the degradation rate of 2,4-dichlorophenol over 1%V-TiO2 is two times higher than that over undoped TiO2. The photocatalytic mechanisms for V-TiO2 samples under UV and visible light irradiation were tentatively discussed. ? 2009 Elsevier B.V. All rights reserved.