期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 158, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2021.110228
关键词
g-C3Nk; CoNi alloy; Photocatalytic H-2 evolution
资金
- Natural Science Foundation of Zhejiang Province, China [LQ21B030005, LY19F040005, LGC20B050014]
- Jiaxing Public Welfare Projects [2020AD10021]
- Key Laboratory of Semiconductor Materials Science [KLSMS-1904]
- Jiaxing University
In this study, a CoNi/g-C3N4 photocatalyst was prepared by a simple method, which showed significantly improved photocatalytic activity compared to g-C3N4 alone, demonstrating the potential of non-precious and Earth-abundant cocatalysts for hydrogen generation.
Non-precious and Earth-abundant cocatalysts have emerged as promising alternatives to precious metal catalysts for hydrogen generation from photocatalytic water splitting. In this work, CoNi/g-C3N4 photocatalyst composed of g-C3N4 nanosheets and CoNi alloyed nanoparticles was prepared by a simple solvothermal and chemical reduction method. Bimetallic CoNi alloy was found to accelerate charge transfer and inhibit electron and hole recombination, thereby enhancing the photocatalytic activity of CoNi/g-C3N4. Under optimal conditions, the hydrogen production rate of CoNi/g-C3N4 reached up to 354.4 mu mol h-1 g-1 with visible light (lambda > 420 nm) in triethanolamine aqueous solution; this value greatly exceeded that of g-C3N4 by a factor of 188 times. A mechanism explaining the excellent photocatalytic performance was proposed accordingly. These results suggest that g-C3N4-based photocatalysts have good potential for hydrogen generation.
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