C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H2 generation from pure water under solar simulating light

Sovann Khan, Minyeong Je, Nhan Nu Thanh Ton, Wenwei Lei, Toshiaki Taniike, Sayaka Yanagida, Daisuke Ogawa, Norihiro Suzuki, Chiaki Terashima, Akira Fujishima, Heechae Choi, Ken ichi Katsumata

Research output: Contribution to journalArticlepeer-review

Abstract

A combined solvothermal method and post-annealing to synthesize highly active ZnS-ZnO nanosheets is presented. ZnO was produced on ZnS nanosheets by thermal annealing ZnS/ethylenediamine in air. From combined studies of experimental and computational works, we revealed that during annealing, carbon (C) element was a major dopant from the decomposition of ethylenediamine, which was unintentionally doped into the ZnS-ZnO, and gave major impacts on enhanced visible-light photocatalysis. Rhodium (Rh) was deposited by in situ photoreduction to form a ZnS-ZnO/Rh catalyst composite. This multijunctioned photocatalyst was outstanding for H2 generation from pure water under solar simulating light due to effective charge separation by Z-scheme heterojunction of ZnS and ZnO and Schottky junction of Rh-cocatalysts/semiconductors. This facile method realizes multijunctioned ZnS-ZnO/Rh photocatalysts with substantial defects that are very promising for solar-energy harvesting applications.

Original languageEnglish
Article number120473
JournalApplied Catalysis B: Environmental
Volume297
DOIs
Publication statusPublished - Nov 15 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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