期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 26, 页码 14888-14896出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta02052h
关键词
-
资金
- Natural Science Foundation of China [21575115, 21705117]
- Program of Tianjin Science and Technology Major Project and Engineering [19ZXYXSY00090]
- Program for Chang Jiang Scholars and Innovative Research Team, Ministry of Education, China [IRT-16R61]
- special fund project for the central government
ZnIn2S4/CdIn2S4 nano-composites obtained through in situ modification demonstrate excellent photocatalytic activity for hydrogen generation under visible light. The enhanced performance can be attributed to the large number of Cd-S-Zn atomic bridges between ZnIn2S4 nanosheets and CdIn2S4 nano-octahedrons, which promote interfacial charge transfer and inhibit carrier recombination.
By an in situ modification of CdIn2S4 nano-octahedron on the surface of ZnIn2S4 nanosheets, ZnIn2S4/CdIn2S4 nano-composites with tight interface contact were obtained by a one-step solvothermal method. Because of the existence of ZnIn2S4/CdIn2S4 nano-heterostructure, the optimized sample (ZCIS-50) exhibited excellent photocatalytic H-2 generation activity (12.67 mmol h(-1) g(-1)) under visible light, which was approximately 15.1 times that of pure CdIn2S4 (0.84 mmol h(-1) g(-1)) and 5.9 times that of ZnIn2S4 (2.13 mmol h(-1) g(-1)). Based on experiments and simulation studies, the remarkable improvement of the photocatalytic performance of ZnIn2S4/CdIn2S4 can be ascribed to the presence of a large number of Cd-S-Zn atomic bridges between ZnIn2S4 nanosheets and CdIn2S4 nano-octahedrons, which not only promoted the interfacial charge transfer but also inhibited the recombination of light-induced carriers. In Na2S/Na2SO3 solution, the apparent quantum yield of the ZCIS-50 sample at 420 nm was 18.73% with good stability under long-term irradiation. This work emphasizes the key role of interface design and defect engineering of in situ nano heterostructures. It may provide a promising strategy for the progress of high-efficiency photocatalytic water-splitting catalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据