Surface Cu^(+) modified ZnIn_(2)S_(4) for promoted visible-light photocatalytic hydrogen evolution  

作　　者：Wen Li Jia Wen Jing Li Hai Yang Yuan Xuefeng Wu Yuanwei Liu Sheng Dai Qilin Cheng Peng Fei Liu Hua Gui Yang 

机构地区：[1]Key Laboratory for Ultrafine Materials of Ministry of Education,Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China [2]Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center,Institute of Fine Chemicals,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Journal of Energy Chemistry》2022年第11期341-348,I0009,共9页能源化学（英文版）

基　　金：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 Commission(E00014);the Science and Technology Commission of Shanghai Municipality(21DZ1207101);the National Natural Science Foundation of China(21902048);the Shanghai Engineering Research Center of Hierarchical Nanomaterials(18DZ2252400);Additional support was provided by the Feringa Nobel Prize Scientist Joint Research Center。

摘　　要：Surface modification by metal ion has been considered a promising strategy to enhance the photocatalytic activity by extending optical response and improving charge separation and transportation.Here,univalent copper species were modified on ZnIn_(2)S_(4)photocatalyst via an in-situ photodeposition method,exhibiting a much higher H2evolution 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 ZnIn_(2)S_(4)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 H2evolution efficiency.

关 键 词：Surface modification Univalent copper species Charge separation and transportation HOMO-LUMO spatial separation Photocatalytic hydrogen evolution 

分 类 号：TQ116.2[化学工程—无机化工] O643.36[理学—物理化学] O644.1[理学—化学]