1. Fabrication of a ternary NiS/ZnIn 2 S 4 /g-C 3 N 4 photocatalyst with dual charge transfer channels towards efficient H 2 evolution.
- Author
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Ji XY, Guo RT, Tang JY, Lin ZD, Yuan Y, Hong LF, and Pan WG
- Abstract
As a renewable green energy, hydrogen has received widespread attention due to its huge potential in solving energy shortages and environment pollution. In this paper, a one-step solvothermal method was applied to grow ultra-thin g-C
3 N4 (UCN) nanosheets and NiS nanoparticles on the surface of ZnIn2 S4 (ZIS). A ternary NiS/ZnIn2 S4 /ultra-thin-g-C3 N4 composite material with dual high-speed charge transfer channels was constructed for the advancement of the photocatalytic H2 generation. The optimal ternary catalyst 1.5wt.%NiS/ZnIn2 S4 /ultra-thin-g-C3 N4 (NiS/ZIS/UCN) achieved a H2 evolution yield reached to 5.02 mmolg-1 h-1 , which was 5.23 times superior than that of pristine ZnIn2 S4 (0.96 mmolg-1 h-1 ) and even outperform than that of the best precious metal modified 3.0 wt%Pt/ZnIn2 S4 (4.08 mmolg-1 h-1 ). The AQY at 420 nm could be achieved as high as 30.5%. The increased photocatalytic performance of NiS/ZIS/UCN could be ascribed to the type-I heterojunctions between intimated ZIS and UCN. In addition, NiS co-catalyst with large quantity of H2 evolution sites, could result in efficient photo-induced charges separation and migration. Furthermore, the NiS/ZIS/UCN composite exhibited excellent H2 evolution stability and recyclability. This work would also offer a reference for the design and synthesis of ternary co-catalyst with heterojunction composite for green energy conversion., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Inc. All rights reserved.)- Published
- 2022
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