文献类型：期刊文献

英文题名：Enhancing photocatalytic activity of Sn doped TiO2 dominated with {105} facets

作者：Jiang, Hai Bo[1];Xing, Jun[1];Chen, Zu Peng[1];Tian, Feng[2];Cuan, Qian[3,4];Gong, Xue-Qing[3,4];Yang, Hua Gui[1,5]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China;[3]E China Univ Sci & Technol, Ctr Computat Chem, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]E China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[5]Griffith Univ, Ctr Clean Environm & Energy, Nathan, Qld 4222, Australia

年份：2014

卷号：225

起止页码：18

外文期刊名：CATALYSIS TODAY

收录：;EI(收录号：20140917379739);WOS:【SCI-EXPANDED(收录号:WOS:000331724500004)】；

基金：This work financially supproted by National Natural Science Foundation of China (20973059, 91022023, 21076076, 21073060, 21203061), Program for professor Special Appointment (Eastern Scholar) at Shanghai Institutions of High Learning, Shanghai Municipal Natural Science Foundation (12ZR1407500), Major Basic Research Programme of science and Technology Commision of Shanghai Municipality (10JC1403200), Australian Research Council's Future Fellowships (FT120100913). National Supercomputer Center in Jinan is acknowledged for computing time.

语种：英文

外文关键词：High facets; TiO2; Sn doping; Photocatalyst; First-principle calculations

摘要：Electronic structures of semiconductor photocatalysts control the light absorbance, charge-carrier separation and mobility, activation energy and consequently, photocatalytic activity. Ion doping has been widely used to modify the electronic structure of a semiconductor photocatalyst. Here, we successfully synthesized Sn doped single crystalline anatase TiO2 particles dominated with {1 0 5} facets by a gas phase oxidation process, and their structure and composition were thoroughly analyzed by XRD/TEM/FESEM/XPS. The photoluminescence emission spectra measurements reveal that the small amount of doped Sn in TiO2 could suppress the recombination of photogenerated electron-hole pairs. Thus, the Sn doped TiO2 shows a significantly enhanced photocatalytic hydrogen evolution performance, with its hydrogen generation rate being 4.5 times higher than that of pure TiO2. First-principle simulation results suggest the doped Sn at the edge exhibit higher adsorption energy toward H, which could promote the H-2 generation from the splitting of water. (C) 2013 Elsevier B.V. All rights reserved.