Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 813, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152190
Keywords
Microwave-assisted hydrothermal method; CdS@ZnS-ZnO; Heterojunction; Photocatalysis; Hydrogen evolution
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Funding
- National Natural Science Foundation of China [21376126, 21776144]
- Fundamental Research Funds in Heilongjiang Provincial Universities, China [135209105]
- Government of Heilongjiang Province Postdoctoral [LBH-Z11108]
- Postdoctoral Researchers in Heilongjiang Province of China Research Initiation Grant Project [LBH-Q13172]
- College Students' Innovative Entrepreneurial Training Program Funded Projects of Qiqihar University [201910232028]
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In this work, CdS@ZnS-ZnO composites were prepared by the temperature-programmed hydrothermal method combined with the microwave-assisted hydrothermal method. The composite consisted mainly of cubic phase ZnS, hexagonal phase CdS and hexagonal phase ZnO, and presented a spherical structure with relatively uniform size and shape. There were heterostructures between CdS, ZnS and ZnO in the spherical structure. At the same time, the grain size, specific surface area, average pore diameter and pore volume of the composited material changed significantly, and its light absorption performance in the visible light region was obviously enhanced, and the photocatalytic activity was also greatly improved. Under ultraviolet light, CdS@ZnS-ZnO can degrade simulated pollutants by more than 90% within 20 min. In addition, the results of hydrogen evolution from photolysis of water showed that the ternary composite CdS@ZnS-ZnO had excellent hydrogen evolution capacity compared with pure CdS, ZnS and ZnO, whose hydrogen evolution amount can reach 3647 mu mol g(-1) in 8 h, was 298 times than that of P25. Moreover, it still maintained a high hydrogen evolution capacity after 4 cycles. (C) 2019 Elsevier B.V. All rights reserved.
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