Photocatalytic Hydrogen Evolution from Water Splitting Using Core-Shell Structured Cu/ZnS/COF Composites

Hydrogen is considered to be a very efficient and clean fuel since it is a renewable and non-polluting gas with a high energy density; thus, it has drawn much attention as an alternative fuel, in order to alleviate the issue of global warming caused by the excess use of fossil fuels. In this work, a...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2021-12, Vol.11 (12), p.3380
Main Authors: Wang, Wenmin, Li, Bing, Yang, Hsin-Ju, Liu, Yuzhi, Gurusamy, Lakshmanan, Karuppasamy, Lakshmanan, Wu, Jerry J
Format: Article
Language:English
Subjects:
Adsorption
Alternative energy sources
Alternative fuels
Catalysts
Clean fuels
Climate change
composite materials
Conduction bands
Core-shell structure
Crystal structure
Ethanol
Experiments
Flux density
Fossil fuels
Gases
Global warming
Hydrogen
Hydrogen evolution
Hydrogen production
Microspheres
Morphology
Nitrogen
Particle size
Photocatalysis
Porous materials
Ratios
Recombination
Solar energy
Solvents
Spectrum analysis
Thin films
Water splitting
Zinc sulfide
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Summary:Hydrogen is considered to be a very efficient and clean fuel since it is a renewable and non-polluting gas with a high energy density; thus, it has drawn much attention as an alternative fuel, in order to alleviate the issue of global warming caused by the excess use of fossil fuels. In this work, a novel Cu/ZnS/COF composite photocatalyst with a core-shell structure was synthesized for photocatalytic hydrogen production via water splitting. The Cu/ZnS/COF microspheres formed by Cu/ZnS crystal aggregation were covered by a microporous thin-film COF with a porous network structure, where COF was also modified by the dual-effective redox sites of C=O and N=N. The photocatalytic hydrogen production results showed that the hydrogen production rate reached 278.4 µmol g h , which may be attributed to its special structure, which has a large number of active sites, a more negative conduction band than the reduction of H to H , and the ability to inhibit the recombination of electron-hole pairs. Finally, a possible mechanism was proposed to effectively explain the improved photocatalytic performance of the photocatalytic system. The present work provides a new concept, in order to construct a highly efficient hydrogen production catalyst and broaden the applications of ZnS-based materials.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano11123380