文献类型：期刊文献

英文题名：Synthesis of nitrogen and terbium co-doped TiO2 nanocrystals with enhanced photocatalytic activity for AO7 degradation under visible-light radiation

作者：Ma, Yunfei[1,2];Yue, Wenhui[1,2];Ye, Ziwei[1,2];Zhang, Jinglong[1,2]

机构：[1]Shanghai Engn Res Ctr Multimedia Environm Catalys, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2022

卷号：46

期号：15

起止页码：6878

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20221511945434);WOS:【SCI-EXPANDED(收录号:WOS:000769615200001)】；

基金：This study was supported by the National Natural Science Foundation of China (21972040), the Program of Introducing Talents of Discipline to Universities (B20031), the Innovation Program of Shanghai Municipal Education Commission (2021-01-07-00-02-E00106), the Science and Technology Commission of Shanghai Municipality (20DZ2250400), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Light - Light absorption - Photocatalytic activity - Catalyst activity - Irradiation - Nanocrystals - Azo dyes - Nitrogen - Terbium

摘要：Doping of TiO2 with metals and/or non-metals is an effective strategy for increasing its inherently low photocatalytic activity. In this work, TiO2 nanocrystals co-doped with nitrogen (N) and terbium (Tb) were prepared using a controlled hydrolysis method with water generated in situ via esterification of acetic acid and n-butanol. Compared with undoped TiO2 nanocrystals, co-doped TiO2 nanocrystals exhibited enhanced visible-light absorption and improved charge-carrier separation efficiency due to the synergy between N and Tb. In addition, they also had larger surface area and stronger interaction with the azo-dye acid orange 7 (AO7) compared with undoped TiO2 nanocrystals, giving rise to catalytic activity which was ca. 2x better than undoped TiO2 nanocrystals for photocatalytic degradation of AO7 under visible-light irradiation. For the given N loading, the optimal Tb doping for co-doped TiO2 nanocrystals to achieve the maximum activity was 1%, at which complete decolorization of AO7 was achieved after 5 hours of visible-light irradiation.