文献类型：期刊文献

英文题名：Fabrication of CoS/CdS heterojunctions for enhanced photocatalytic hydrogen production

作者：Shen, Luping[1,2];Cheng, Jiajun[2];Wang, Xiao[3];Wang, Hongmei[2];Lu, Zhufeng[2];Guo, Liping[2];Ma, Hongxia[2];Li, Lei[2];Wen, Herui[1]

机构：[1]Jiangxi Univ Sci & Technol, Sch Chem & Chem Engn, Jiangxi Prov Key Lab Funct Mol Mat Chem, Ganzhou 341000, Peoples R China;[2]Jiaxing Univ, Coll Biol, Chem Sci & Engn, Jiaxing 314001, Peoples R China;[3]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2022

卷号：541

外文期刊名：INORGANICA CHIMICA ACTA

收录：;EI(收录号：20223012410563);WOS:【SCI-EXPANDED(收录号:WOS:000863478200004)】；

基金：This work was financially supported by Natural Science Foundation of Zhejiang Province (No. LY22E020009) , Jiaxing Public Welfare Projects (No. 2020AD10021) , and National Innovation and Entrepreneurship Program for College Students (No. 202110354037) .

语种：英文

外文关键词：CdS/CoS; Hydrogen evolution; Photocatalysis; DFT

摘要：Non-noble metal cocatalyst has showed good potential for improving photocatalytic hydrogen evolution reaction (HER). In this study, the non-precious metal cobalt sulfide (CoS) cocatalyst was deposited onto the CdS surface to construct heterojunctions using a solvothermal method. The fabricated structures were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible diffuse-reflectance spectroscopy (UV-vis DRS), photoluminescence (PL), time-resolved PL spectra (TRPL) and photoelectrochemical measurements (PEC). The heterojunctions were evaluated as photocatalysts using the hydrogen evolution reaction with lactic acid as a sacrificial agent. The optimized 60 %-CoS/CdS sample shows a photocatalytic H-2 production rate of 3193.7 mu molmiddoth(-1)middotg(-1) under visible light (lambda >= 400 nm), which is 32 times higher than that of pure CdS. The improved performance is attributed to a great improvement in separation efficiency of the photogenerated electron-hole pairs.