Journal
NANO ENERGY
Volume 27, Issue -, Pages 466-474Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2016.07.014
Keywords
Photocorrosion; CdS nanoparticles; Recrystallization process; MoS2 nanosheets; Photocatalyst
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Funding
- National Natural Science Foundation of China [51572153]
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CdS systems represent promising photocatalysts for hydrogen generation; however, these systems are seriously restricted by inherent issues with photocorrosion. Here, the CdS photocorrosion process is prevented and a high stable and effective photocatalyst is obtained in the novel OD/2D CdS/MoS2 nanosheet composite system. According to crystallization kinetics, the CdS photocorrosion process will be prevented if the S elements resulting from photocorrosion can be reduced back to S2- in the same photocatalytic system. So a photocorrosion-recrystallization strategy is proposed for the first time to resolve issues with photocorrosion when using CdS photocatalysts. Meanwhile, the recrystallized OD/2D CdS/MoS2 nanocomposite produces a high quantum efficiency of 23.03% (lambda(ex)=420 nm), the evolution of hydrogen presents no notable activity losses for up to 400 h. Thus, the approach demonstrated here represents a promising method of designing and fabricating more stable and efficient composite chalcogenide photocatalysts. (C) 2016 Elsevier Ltd. All rights reserved.
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