PHOTOCATALYTIC H_2 PRODUCTION UNDER VISIBLE LIGHT IRRADIATION ON NOVEL HETEROSTRUCTURE NIS/ZNS NANOSHEET PHOTOCATALYST

摘要

The sheet-like NiS-ZnS heterostructured composites were prepared by the microwave hydrothermal. The fabrication of the heterojunctions broadened the range of light response of ZnS. The photoexcited electrons of ZnS migrated to the redox potential of NiS/Ni_2S under visible light irradiation, which can facilitate the effective separation of photogenerated electrons and holes in space. The visible photocatalytic activity towards hydrogen production for NiS/ZnS nanosheet heterostructed composites without co-catalyst achieved 0.28 mmol h~(-1), and the quantum efficiency was up to 18.6% under the wavelength with 420 nm visible light irradiation.