Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 380, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2019.111853
Keywords
Metal-organic frameworks; Sulfide; Hydrogen evolution; Photocatalysis
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Funding
- Innovative Research Team Project of Shanghai [IRT13078]
- National Natural Science Foundation of China [11872235]
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In this work, porous CuS/ZnS microspheres have been successfully fabricated through a facile metal-organic framework (MOF) derived route. The preparation process involved a solvothermal method for synthesis of bimetallic MOF (Cu-Zn-MOF) and subsequently vulcanization treatment to transform into CuS/ZnS microspheres. The MOF-derived CuS/ZnS microspheres inherited the porous skeleton of the Cu-Zn-MOF precursor, which significantly enhanced the utilization of light and synchronously provided plentiful exposed catalytic active sites. The obtained CuS/ZnS microspheres exhibited excellent photocatalytic activity for hydrogen production via water splitting. The optimized CuS/ZnS photocatalyst demonstrated a H-2-production rate of 310.43 mu mol h(-1) under visible light with an apparent quantum efficiency of 8.5% at 420 nm. Such excellent photocatalytic H-2-evolution activity was ascribed to the interfacial charge transfer from the valence band of ZnS to CuS, which facilitated the efficient electron-hole separation and transportation. This study provides a strategy for the rational design of MOF-derived photocatalysts to dramatically increase H-2 production efficiency.
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