Construction of PdS@MIL-125-NH_(2)@ZnS type-Ⅱ heterostructure with efficient charge separation for boosted photocatalytic hydrogen evolution  

作　　者：Zige Tai Guotai Sun Ting Wang Zhihui Li Jinge Tai 

机构地区：[1]Research&Development Institute of Northwestern Polytechnical University in Shenzhen,Shenzhen 518063,China [2]State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China [3]The Second Affiliated Hospital of Air Force Military Medical University,Xi’an 710038,China

出　　处：《Journal of Materials Science & Technology》2023年第14期116-124,共9页材料科学技术（英文版）

基　　金：This work was financially supported by the Guangdong Basic and Applied Basic Research Foundation(No.207079374034);the State Key Laboratory of Solidification Processing(No.2021-BJ-04);the State Key Laboratory for Mechanical Behavior of Materials(No.20222421)。

摘　　要：A new photocatalyst,PdS@NH_(2)-MIL-125(Ti)@ZnS(PdS/M125/ZnS)heterojunction is fabricated for photo-catalytic H_(2)generation for the first time,where PdS nanoparticles are anchored in the pore of M125 by utilizing its confinement effect,and the ZnS is closely wrapped on the surfaces of the MOFs.The optimal photocatalyst exhibits a significantly enhanced H_(2)generation rate of 1164.2μmol/g/h,while the pure M125 only displays a H_(2)generation rate of 16.7μmol/g/h.The resultant improvement can be ascribed to the following comprehensive advantages.The hierarchical structure built by PdS,M125,and ZnS can form lots of intimate interfaces,offer abundant sites for reaction,and smooth channels for charge carri-ers due to the porous characteristics of MOFs.Moreover,M125 and ZnS with inner defect levels form an analogous type-II heterojunction assisted by PdS co-catalyst,which greatly promotes charge separation.This work may supply a new avenue to design MOFs photocatalysts for energy conversion.

关 键 词：Hydrogen evolution Water splitting Metal-organic framework Defect levels Type-II heterostructure 

分 类 号：TQ426[化学工程] TQ116.2[一般工业技术—材料科学与工程] TB383.1