Journal
POWDER TECHNOLOGY
Volume 406, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2022.117596
Keywords
Diamond-like CdS nanoparticles; MoS2; CdS nanocomposites; Hydrogen production; Photocatalysts; Visible light irradiation
Categories
Funding
- National Natural Science Foundation of China [51974086]
- Fundamental Research Funds for the Central Universities [N2125027, N2124007-1]
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This study demonstrates high-performance visible-light-driven H-2-evolution photocatalysts based on novel CdS nanodiamonds decorated with MoS(2) nanosheets. The composites exhibited enhanced photocatalytic performances due to improved optical absorption range, low recombination rate of the photo-generated electrons and holes, extra generated charges, excellent charge transfer ability, and increased donor density.
This study demonstrates high-performance visible-light-driven H-2-evolution photocatalysts based on novel CdS nanodiamonds. The CdS nanodiamonds (~100 nm) were prepared by optimizing the molar ratios of Cd to S (Cd/ S = 1:8) via a hydrothermal method. Various amounts of MoS(2 )nanosheets were decorated on the surface of the CdS nanodiamonds. The 6 wt% MoS2/CdS nanocomposites exhibited the highest H-2 evolution rate (32.94 mmol g(-1) h(-1)), which was 3 times (10.37 mmol g(-1) h(-1)) higher than that of the pristine CdS nanodiamonds under visible light irradiation. The underlying reasons for the enhanced photocatalytic performances were investigated by measuring the electro-chemical properties of the composites, suggesting that the improved performances were attributed to suitable optical adsorption range, low recombination rate of the photo-generated electrons and holes, extra generated charges, excellent charge transfer ability, and increased donor density. This study offers new insights for preparing the CdS nanoparticles with novel structures and high-photocatalytic performances for solar-hydrogen energy conversion.
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