In situ integration of efficient photocatalyst Cu1.8S/ZnxCd1-xS heterojunction derived from a metal-organic framework  

作　　者：Dongpeng Zhang Pengfei Wang Fangyuan Chen Kelei Mu Yi Li Haitao Wang Zhijun Ren Sihui Zhan 

机构地区：[1]MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control,College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China [2]School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China [3]Department of Chemistry,Tianjin University,Tianjin 300072,China

出　　处：《Chinese Chemical Letters》2020年第10期2795-2798,共4页中国化学快报（英文版）

基　　金：the financially support by the National Natural Science Foundation of China as general projects(Nos.21722702 and 21874099);the Tianjin Commission of Science and Technology as key technologies R&D projects(Nos.18YFZCSF00730,18YFZCSF00770 and 18ZXSZSF00230);National Key Basic Research Program of China(No.2017YFA0403402);Science and Technology Research Projects of Colleges and Universities in Hebei province(No.ZD2020149)。

摘　　要：The development of photocatalysts for hydrogen evolution is a promising alternative to industrial hydrogen evolution;however,generation of high active,recyclable,inexpensive heterojunctions are still challenging.Herein,a novel strategy was developed to synthesize non-noble metal co-catalyst/solid solution heterojunctions using metal-organic frameworks(MOFs)as a precursor template.By adjusting the content of MOFs,a series of Cu1.8S/ZnxCd1-xS heterojunctions were obtained,and the Cu1.8S(3.7%)/Zn0.35Cd0.65S sample exhibits a maximum hydrogen evolution rate of 14.27 mmol h^(-1) g^(-1) with an apparent quantum yield of 3.7%at 420 nm under visible-light irradiation.Subsequently,the relationship between the heterojunction and photocatalytic activity were investigated by detailed characterizations and density functional theory(DFT)calculations,which reveal that loading Cu1.8S can efficiently extend the light absorption,meanwhile,the electrons can efficiently transfer from Zn0.35Cd0.65S to Cu1.8S,thus resulting more photogenerated electrons participating in surface reactions.This result can be valuable inspirations for the exploitation of advanced materials using rationally designed nanostructures for solar energy conversion.

关 键 词：CO-CATALYST Cu1.8S/Zn0.35Cd0.65S Density functional theory(DFT) Charge separation and transfer 

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]