Molybdenum disulfide quantum dots directing zinc indium sulfide heterostructures for enhanced visible light hydrogen production

Yang Liu, Chao Fan Li, Xiao Yun Li, Wen Bei Yu, Wen Da Dong, Heng Zhao, Zhi Yi Hu, Zhao Deng, Chao Wang, Si Jia Wu, Hao Chen, Jing Liu, Zhao Wang, Li Hua Chen, Yu Li, Bao Lian Su

Research output: Contribution to journalArticlepeer-review

Abstract

Photocatalytic hydrogen (H 2 )production based on semiconductors is important to utilize solar light for clean energy and environment. Herein, we report a visible light responsive heterostructure, designed and constructed by molybdenum disulfide quantum dots (MoS 2 -QDs)in-situ seeds-directing growth and self-assemble of zinc indium sulfide (ZnIn 2 S 4 )nanosheet to ensure their full contact through a simple one-step solvothermal method for highly improved visible light H 2 production. The MoS 2 -QDs in-situ seeds-directing ZnIn 2 S 4 heterostructure not only builds heterojunctions between MoS 2 and ZnIn 2 S 4 to spatially separate the photogenerated electrons and holes, but also serves as the active sites trapping photogenerated electrons to facilitate H 2 evolution. As a result, MoS 2 -QDs/ZnIn 2 S 4 exhibits high photocatalytic activity for H 2 production, and the optimized 2 wt% MoS 2 -QDs/ZnIn 2 S 4 (2MoS 2 -QDs/ZnIn 2 S 4 )heterostructure exhibits the highest H 2 evolution rate of 7152 umol·h −1 ·g −1 under visible light, ∼9 times of pure ZnIn 2 S 4 . Our strategy here could shed some lights on developing noble-metal free heterostructures for highly efficient photocatalytic H 2 production.

Original languageEnglish
Pages (from-to)111-118
Number of pages8
JournalJournal of Colloid and Interface Science
Volume551
DOIs
Publication statusPublished - 1 Sep 2019

Keywords

  • Heterostructure
  • MoS
  • Photocatalytic hydrogen production
  • Quantum dots
  • ZnIn S

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