文献类型：期刊文献

英文题名：Photocatalysis oxidation activity regulation of Ag/TiO2 composites evaluated by the selective oxidation of Rhodamine B

作者：Liang, Huijun[1,2];Jia, Zhichao[1];Zhang, Hucheng[1];Wang, Xiaobing[1];Wang, Jianji[1]

第一作者：梁慧君;Liang, Huijun

通讯作者：Zhang, HC[1];Wang, XB[1];Wang, JJ[1]

机构：[1]Henan Normal Univ, Sch Chem & Chem Engn, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China;[2]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：Henan Normal Univ, Sch Chem & Chem Engn, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China

通讯机构：[1]corresponding author), Henan Normal Univ, Sch Chem & Chem Engn, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China.

年份：2017

卷号：422

起止页码：1-10

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20172403752794);Scopus(收录号：2-s2.0-85020259441);WOS:【SCI-EXPANDED(收录号:WOS:000410606900001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grant No. 21573059), the Henan Province Natural Science Foundation (No. 162300410175), Science and Technology Research Project of Henan Province (No. 152102310311), the Key Scientific Research Project of Colleges and Universities in Henan (No. 17A150031, 16A150032) and Henan Normal University Innovation Funds for Postgraduate (No. YL201512). H.L., Z.J. contributed equally to this work.

语种：英文

外文关键词：Ag/TiO2 composites; Selective photooxidation; Rhodamine B; Photocatalysis mechanism

摘要：With the aid of TiO2 and Ag/TiO2 composites with ultrahigh specific surface areas (about 400 m(2) g(-1)), we demonstrated a facile controlled strategy to adjust the photooxidation activity of Ag/TiO2 in the photocatalysis degradation process of Rhodamine B (RhB). A series of photocatalysis experiment results indicated that the selective oxidation of RhB could be performed through changing irradiation light. When the as-prepared unannealed Ag/TiO2 was used as photocatalyst, Rh-110 was produced only under visible light irradiation. Instead, RhB would be oxidized completely under ultraviolet irradiation or using the annealing Ag/TiO2. Although there were many photocatalysis degradation mechanisms of RhB in previous literatures, we have not found an appropriate mechanism to explain this phenomenon. Radical-trapping tests indicated that the effect of superoxide anion radical was more important than hydroxyl radical in the forming process of Rh-110, and hence the selective oxidation mechanism of Ag/TiO2 was suggested according to the role changing of Ag nanoparticles on the composites under visible and ultraviolet irradiation. (c) 2017 Elsevier B.V. All rights reserved.