文献类型：期刊文献

英文题名：Preparation of nitrogen and fluorine co-doped mesoporous TiO₂ microsphere and photodegradation of acid orange 7 under visible light

作者：Wu, Yongmei[1,2];Xing, Mingyang[1,2];Tian, Baozhu[1,2];Zhang, Jinlong[1,2,3];Chen, Feng[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Guizhou Normal Univ, Sch Chem & Mat Sci, Guiyang 550001, Peoples R China

年份：2010

卷号：162

期号：2

起止页码：710

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000281463900035)】；

基金：This work has been supported by National Nature Science Foundation of China (20773039, 20977030), National Basic Research Program of China (973 Program, 2007CB613301, 2010CB732306), Science and Technology Commission of Shanghai Municipality (10520709900) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Titania miscrosphere; Nitrogen and fluorine codoping; Photocatalysis; Visible light

摘要：N and F-codoped TiO2 microspheres were prepared by ethanol solvothermal method, using tetrabutyl titanate as precursor, urea as a nitrogen source and ammonium fluoride as a fluorine source. The prepared catalysts were characterized by X-ray diffraction (XRD). N-2 physical adsorption, scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS), ultraviolet-visible adsorption spectroscopy and photoluminescence spectra (PL). The photocatalytic performance of N-F-TiO2 microspheres was evaluated by analyzing the degradation of acid orange 7 (AO7) under visible light irradiation. It was found that N-F-TiO2 microsphere with mesoporous structure is composed by anatase phase, and the interstitial doping of nitrogen into TiO2 lattice might be responsible for the visible light response. Meanwhile, F-doping could not only retard the transformation from anatase to rutile, but also increase the concentration of OH center dot radicals in solution, which is beneficial for improving the photodegradation rate of organic compounds. The synergetic effect of nitrogen and fluorine doping leads to the high activity of N-F-TiO2 for the photodegradation of AO7 under visible light irradiation. (C) 2010 Elsevier B.V. All rights reserved.