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]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Adv Mat Lab, Shanghai 200237, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000274348300028)】；

基金：This work has been supported by the National High Technology Research and Development Program of China (2006AA03Z358), the National Natural Science Foundation of China (20706015, 50703009), the Shanghai Rising-Star Program (06QA14013, 07QA14014), the Major Basic Research Project of Shanghai (07DJ14001), the Ph.D. Programs Foundation of Ministry of Education of China (20070251022), the Special Projects for Key Laboratories in Shanghai (07DZ22016, 06DZ22008), the Special Projects for Nanotechnology of Shanghai (0752nm010, 0652nm034).

语种：英文

外文关键词：Titanium dioxide; Nanoparticles; Flame spray pyrolysis; Photocatalytic activity; V doping

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. (C) 2009 Elsevier B.V. All rights reserved.