Journal
APPLIED SURFACE SCIENCE
Volume 504, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2019.144406
Keywords
CdS; MoS2; ZnIn2S4; Water splitting; Z-scheme
Categories
Funding
- Zhejiang Provincial Natural Science Foundation [LQ19E020001]
- National Natural Science Foundation of China [21671146]
- Science and Technology Project of Taizhou City [1902gy19]
- Key Research and Development Projects of Zhejiang Province [2018C04006]
- Chemical Engineering & Technology of Zhejiang Province First-Class Discipline (Taizhou University)
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All-solid-state Z-scheme CdS/QDs/ZnIn2S4 architectures with MoS2 quantum dots as solid-state electron mediator were successfully designed and constructed by optimally combining one-dimensional CdS nanorods, zerodimensional MoS2 quantum dots (QDs) and two-dimensional ZnIn2S4 nanosheets. The photocatalytic water splitting for hydrogen evolution demonstrated that such structural design can synergistically trigger remarkably improved visible-light-driven photocatalytic activity. Photocatalytic H-2-evolution at 2107.5 mu mol g(-1) h(-1) was achieved on this CdS/QDs/ZnIn2S4 architectures under visible light irradiation, exceeding those of bare CdS nanorods and pure ZnIn2S4 nanosheets by a factor of 26 and 62, respectively. This highly efficient photocatalytic activity arises from the effective charge separation and favourable electron mediator of MoS2 QDs. The Z-scheme charge separation mechanism was verified by the ESR, PL-TA and organic electron acceptor test.
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