期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 618, 期 -, 页码 300-310出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.03.099
关键词
NiS; Photocatalysis; Hydrogen evolution; Heterojunction; Charge separation
资金
- National Key R&D Program of China [2018YFB0605002]
- National Natural Science Foundation of China [21546014]
In this paper, a one-step solvothermal method was used to fabricate a ternary composite material that exhibits improved efficiency and stability in photocatalytic hydrogen generation. The optimal ternary catalyst achieved a high H2 evolution yield and AQY value, surpassing the performance of precious metal modified catalysts. Additionally, the composite material demonstrated excellent stability and recyclability.
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-C3N4 (UCN) nanosheets and NiS nanoparticles on the surface of ZnIn2S4 (ZIS). A ternary NiS/ZnIn2S4/ultra-thin-g-C3N4 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/ZnIn2S4/ultra-thin-g-C3N4 (NiS/ZIS/UCN) achieved a H2 evolution yield reached to 5.02 mmolg-1h-1, which was 5.23 times superior than that of pristine ZnIn2S4 (0.96 mmolg-1h-1) and even outperform than that of the best precious metal modified 3.0 wt%Pt/ZnIn2S4 (4.08 mmolg-1h-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.
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