3D ordered macroporous Pt/ZnS@ZnO core-shell heterostructure for highly effective photocatalytic hydrogen evolution

摘要

ZnO, as a typical n-type semiconductor catalyst with low cost and high electron mobility, is concerned by numerous pursuers in the field of photocatalysis. However, because of its poor photo-reduction ability and high recombination rate, the ZnO in photocatalytic H-2 evolution is greatly limited. To acquire an outstanding photocatalytic H-2 evolution performance, 3D ordered macroporous (3DOM) ZnO is sulfurized in-situ to construct 3DOM ZnS@ZnO heterostructure. The ordered macroporous structure not only accelerates the migration of electrons and ions but also curtails the shift space of electrons and holes. The multi-junction assemblage between ZnO and ZnS effectively decreases the recombination of electron-hole pairs and improves the photo-redox capacity. The 3DOM Pt/ZnS@ZnO heterostructure exhibiting an excellent performance is 87.6 mu mol g(-1) h(-1) in pure water. Therefore, our research presents an innovative procedure for designing other porous heterostructure photocatalysts. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.