文献类型：期刊文献

英文题名：Improving the visible light photocatalytic activity of nano-sized titanium dioxide via the synergistic effects between sulfur doping and sulfation

作者：Niu, Yuxiao;Xing, Mingyang;Tian, Baozhu;Zhang, Jinlong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2012

卷号：115

起止页码：253

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20121014835572);WOS:【SCI-EXPANDED(收录号:WOS:000302429600029)】；

基金：This work has been supported by National Basic Research Program of China (973 Program, 2010CB732306), National Nature Science Foundation of China (21007016 and 20977030), the Project of International Cooperation of the Ministry of Science and Technology of China (2011DFA50530), Science and Technology Commission of Shanghai Municipality (10520709900 and 10JC1403900) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Potassium persulfate; Synergistic action; Sulfur dopin; SO42-; Phenol degradation

摘要：S-doped and sulfated nano-sized TiO2 photocatalysts were prepared by a low-temperature solvothermal method, using potassium persulfate as sulfur source. The obtained samples were characterized by XRD, UV-vis DRS, FTIR, FTIR-pyridine, XPS, and nitrogen adsorption-desorption methods. Compared with undoped TiO2, the S-doped and sulfated TiO2 photocatalysts exhibited much higher photocatalytic activity for phenol degradation under visible light irradiation. It was revealed that S was not only incorporated into the crystal lattice of TiO2 replacing Ti4+ (as S4+) but also anchored on its surface in the form of SO42-. Further study indicated that there are synergistic effects between doped S and anchored SO42- on improving the visible light photocatalytic activity of TiO2. The doped S can form an impurity level below the conduction band of TiO2, extending the light response of TiO2 into visible light region, while SO42- anchored on TiO2 surface is favorable for trapping photo-induced electrons, suppressing the recombination of electrons and holes and consequently promoting the formation of hydroxyl radical. (C) 2012 Elsevier B.V. All rights reserved.