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Noble‐metal‐free MOF Derived ZnS/CeO 2 Decorated with CuS Cocatalyst Photocatalyst with Efficient Photocatalytic Hydrogen Production Character
Author(s) -
Wang Xiaoli,
Xiao Yang,
Yu Hui,
Yang Ying,
Dong Xiangting,
Xia Long
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202001118
Subject(s) - photocatalysis , materials science , calcination , catalysis , hydrogen production , dodecahedron , water splitting , noble metal , chemical engineering , photocatalytic water splitting , nanotechnology , inorganic chemistry , metal , metallurgy , chemistry , crystallography , engineering , biochemistry
Inspired by the rich morphology of ZnO and cation‐exchange technology, regular dodecahedron‐like CeO 2 /ZnO was obtained by the calcination of Ce doped ZIF‐8 precursor in this study, and CeO 2 /ZnS was obtained by the in‐situ vulcanization of CeO 2 /ZnO. This design not only maintained the morphology of ZIF‐8, but also enhanced the oxidation‐reduction capacity of the catalyst. When the Ce content was 10 wt %, 10‐CeO 2 /ZnS sample showed the best photocatalytic hydrogen production performance in all X−CeO 2 /ZnS samples. Loading of co‐catalysts can effectively enhance the surface hydrogen reduction in photocatalytic water splitting by introducing a positive Schottky barrier. CuS was regarded as a promising cocatalyst to replace the noble metals due to its low cost and equivalent or even better performance. The in‐situ cation exchange method was used to load co‐catalyst CuS on the 10‐CeO 2 /ZnS composites to obtain the 10‐CeO 2 /ZnS‐CuS composites which had the large specific surface area, regular dodecahedral structure and much excellent photolysis of water to produce hydrogen characters. This work provided a new strategy for the advantages combining of co‐catalyst, p‐n junction as well as the porous structure to enhance the photocatalytic characters.