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Construction of Zn x Cd y S with a 3D Hierarchical Structure for Enhanced Photocatalytic Hydrogen Production from Water Splitting.

Xianglei CaoLiugen ZhangChangyan GuoMeng WangJia GuoJide Wang
Published in: Inorganic chemistry (2023)
The Zn x Cd y S has been proven to have unique photoelectric properties, but its synthesis method and photocatalytic water cracking performance need to be further improved. In this paper, Cd-MOF@ZIF-8 with a MOF-on-MOF (MOF = metal-organic framework) structure was prepared by a simple ion adsorption method. Then, a CdS/Zn x Cd y S heterojunction with a 3D hierarchical structure was formed by solvothermal sulfidation. The prepared catalysts with different Zn/Cd ratios show an improved hydrogen production performance for photocatalytic water splitting, and the hydrogen evolution rate of Zn 1 Cd 1 S can reach up to 29.2 mmol·g -1 ·h -1 . The excellent photocatalytic activity not only benefits from Zn x Cd y S strong light conversion ability but also is closely related to the hierarchical structure and large specific surface area. A type II heterojunction also plays an important role in the spatial separation of photogenerated carriers. This paper provides a simple and feasible idea for the synthesis of a photocatalyst with a large specific surface area using a MOF-on-MOF synthesis strategy.
Keyphrases
  • metal organic framework
  • visible light
  • heavy metals
  • highly efficient
  • nk cells
  • reduced graphene oxide
  • risk assessment
  • quantum dots
  • mass spectrometry