标题：Synergistic effect of N- and F-codoping on the structure and photocatalytic performance of TiO2
作者：Yu, Jiemei; Liu, Zongming; Zhang, Haitao; Huang, Taizhong; Han, Jitian; Zhang, Yihe; Chong, Daohuang
作者机构：[Yu, J] School of Energy and Power Engineering, Shandong University, Jinan, 250061, China, School of Chemistry and Chemical Engineering, University of 更多
通讯作者地址：[Huang, TZ]Univ Jinan, Sch Chem & Chem Engn, Jinan 250022, Peoples R China.
关键词：TiO2 hydrolysis;Anion doping;Photocatalyst;Nanoparticle
摘要：Three types of TiO2 nanostructures were synthesized via a facile hydrolysis method at 195 degrees C. Effects of the preparation method and doping with N and F on the crystal structure and photocatalytic performance of TiO2 were investigated. The nanomaterials were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller porosimetry, ultraviolet visible diffuse reflectance spectroscopy and fluorescent emission spectra. Their photo-catalytic activity was examined by the photodegradation of methylene blue in aqueous solution under both ultra-violet and visible light irradiation. The results show that nitrogen and fluorine co-doped anatase TiO2 had the characteristics of a smaller crystalline size, broader light absorption spectrum and lower charge recombination than pure TiO2. Most importantly, more efficient photocatalytic activity under both ultra-violet and visible light was observed. The obtained N-F-TiO2 nanomaterial shows considerable potential for water treatment under sunlight irradiation. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.