文献类型：期刊文献

英文题名：Surface Cu+ modified ZnIn2S4 for promoted visible-light photocatalytic hydrogen evolution

作者：Li Jia, Wen[1];Li, Wen Jing[1];Yuan, Hai Yang[1];Wu, Xuefeng[1];Liu, Yuanwei[1];Dai, Sheng[2,3];Cheng, Qilin[1];Liu, Peng Fei[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：74

起止页码：341

外文期刊名：JOURNAL OF ENERGY CHEMISTRY

收录：;EI(收录号：20223412612977);WOS:【SCI-EXPANDED(收录号:WOS:000861065000004)】；

基金：This work was financially supported by the National Natural Science Funds for Distinguished Young Scholars (51725201) , the International (Regional) Cooperation and Exchange Projects of the National Natural Science Foundation of China (51920105003) , the Innovation Program of Shanghai Municipal Education Commis- sion (E00014) , the Science and Technology Commission of Shanghai Municipality (21DZ1207101) , the National Natural Science Foundation of China (21902048) and the Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400) . The authors also thank the Frontiers Science Center for Materiobi- ology and Dynamic Chemistry. The authors also thank the crew of the BL14W1 beamline at the Shanghai Synchrotron Radiation Facil- ity (SSRF) and the 1W1B beamline of Beijing Synchrotron Radiation Facility (BSRF) for their constructive assistance with the XAFS mea- surements and data analyses. Additional support was provided by the Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Surface modification; Univalent copper species; Charge separation and transportation; HOMO-LUMO spatial separation; Photocatalytic hydrogen evolution

摘要：Surface modification by metal ion has been considered a promising strategy to enhance the photocat-alytic activity by extending optical response and improving charge separation and transportation. Here, univalent copper species were modified on ZnIn2S4 photocatalyst via an in-situ photodeposition method, exhibiting a much higher H2 evolution rate of 41.10 +/- 3.43 mmol g(-1) h(-1) and an impressive apparent quantum efficiency (AQE) of 20.81% at 420 +/- 15 nm. Our characterizations indicate that the surface modification by copper species can broaden light utilization as well as promote charge separation and transportation. Besides, the density functional theory (DFT) results further exhibit that the energy levels (LUMO and HOMO) for copper-surface modified ZnIn2S4 present spatial separation, locating on the Zn-S and In-S layers, respectively, which can suppress the recombination of electron and hole and thus achieves higher photocatalytic H2 evolution efficiency. (C) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.