文献类型：期刊文献

英文题名：ZnIn2S4 with oxygen atom doping and surface sulfur vacancies for overall water splitting under visible light irradiation

作者：Jing, Haitong[1,3,4]; Ren, Jun[1]; Yue, Jianyong[1,3,4]; Liu, Shiyan[1]; Liang, Qifeng[1]; Wu, Rong[3,4]; Wang, Yawei[5]; Fang, Zebo[1]; Li, Huili[2]; Wei, Shunhang[1]

机构：[1] Zhejiang Engineering Research Center of MEMS, Shaoxing University, Shaoxing, 312000, China; [2] College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, China; [3] School of Physics Science and Technology, Xinjiang University, Xinjiang, Urumqi, 830000, China; [4] Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, Xinjiang, Urumqi, 830017, China; [5] School of Chemistry and Chemical Engineering, Jiujiang University, Jiujiang, 332005, China

年份：2022

外文期刊名：Catalysis Science and Technology

收录：EI(收录号：20225013232599)、Scopus(收录号：2-s2.0-85143604676)

基金：This work was supported by the National Natural Science Foundation of China (Grant no. 51872186, 22066024, and 52062023), the Shanghai Sailing Program (Grant No. 20YF1435100), and a project funded by the China Postdoctoral Science Foundation (Grant No. 2021M702316).

语种：英文

外文关键词：Atoms - Calcination - Carrier concentration - Efficiency - Hydrogen production - Indium compounds - Irradiation - Oxygen - Photocatalytic activity

外文摘要：Previous reports have found that surface sulfur vacancies can improve the hydrogen production performance of ZnIn2S4, and oxygen atom doping can improve its water oxidation ability. However, the simultaneous introduction of these two factors to achieve photocatalytic overall water splitting under visible-light irradiation has not been reported. In this work, we introduce surface sulfur vacancies and oxygen atom doping simultaneously via calcination of the ZnIn2S4 obtained by a hydrothermal method under an air atmosphere. Their synergistic effect on the photocatalytic overall water splitting activity is investigated in detail by controlling the calcination temperature and calcination time. Both surface sulfur vacancies and oxygen atom doping can inhibit carrier recombination, and oxygen atom doping can increase the photogenerated carrier concentration. Surface sulfur vacancies and oxygen atom doping can increase the photocatalytic rate 2-3 times, respectively, confirming that the two are equally important for the improvement of photocatalytic activity. More importantly, the synergistic effect of sulfur vacancies and oxygen atom doping results in a solar-to-hydrogen (STH) efficiency of ～0.035% (the highest efficiency reported so far for single-phase ZnIn2S4) and a stable photocatalytic overall water splitting performance. ? 2022 The Royal Society of Chemistry.