Journal
NANOTECHNOLOGY
Volume 31, Issue 30, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab8850
Keywords
photocatalytic H-2 evolution; Mn<0; 3Cd0; 7S; NiCoP; visible light
Funding
- Shandong Province Natural Science Foundation, China [ZR2018MEM019]
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Efficient and noble metal-free co-catalyst loading is an effective solution for separating and transferring photo-generated carriers and lowering the overpotential in photocatalytic H-2 evolution activity. In this work, we designed and prepared a series of novel NiCoP/Mn0.3Cd0.7S (NCP/MCS) composites by modifying MCS nanorods with the co-catalyst NCP using a simple calcination method. Notably, the 10-NCP/MCS composite displays the optimum photocatalytic H-2 evolution rate of 118.5 mmol g(-1) h(-1) under visible-light irradiation. This is approximately 3.39 times higher than that of pure MCS. The corresponding apparent quantum efficiency is 10.2% at 420 nm. The superior photocatalytic activity of the NCP/MCS composites can be attributed to the efficient separation of photogenerated carriers caused by the intimate heterojunction interface between NCP and MCS, smaller transfer resistance, and lower overpotential of NCP. Moreover, the NCP/MCS composites exhibit remarkable photostability. A plausible mechanism is proposed.
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