期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 15, 页码 9201-9208出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.12.249
关键词
ZnS; SnO2 heterojunction; One-step hydrothermal method; Z-scheme; Photocatalytic hydrogen evolution
资金
- National Science Foundation of China (NSFC) [51834009, 51801151, U1866203]
- Natural Science Foundation of Shaanxi Province [2020JZ-47, 2020JM-451]
- Hundred Talent Program of Shaanxi Province
- Key Laboratory Project of Shaanxi Education Department [18JS070, 18JK0560, 17JS081]
- Shaanxi Province Science Fund for Distinguished Young Scholars [2018JC-027]
- China Postdoctoral Science Foundation [2018M633643XB]
- Key Research and Development Project of Shaanxi Province [2017ZDXM-GY-033, 2017ZDXM-GY-028]
- Key Laboratory Project of Science and Technology Agency [13JS075]
This study reports the in-situ synthesis of sea-urchin-like ZnS/SnO2 Z-scheme heterojunctions, which exhibit excellent photocatalytic activity by promoting carrier separation and maintaining high reduction ability.
Constructing direct Z-scheme heterostructure is an effective way to promote the separation of photogenerated carriers and optimize the redox ability of the photocatalytic system. This work reports the in-situ synthesis of sea-urchin-like ZnS/SnO2 Z-scheme heterojunctions via a one-step hydrothermal method. Both experimental results and density functional theory (DFT) calculations indicate that the tight interfaces derived from in-situ precursor dissociation can ensure a fast transfer for photogenerated carriers, meanwhile, the Z-scheme type of heterojunctions can increase the carrier separation efficiency and maintain the high reduction ability of photogenerated electrons. As expected, the photocatalytic hydrogen evolution rate of the as-optimized ZnS/SnO2 sample can reach 2.17 mmol g-1 h-1, which is 15.5 times higher than that of the commercial ZnS. This work can offer a novel strategy for designing Z-scheme heterojunction as well as controlling the contact interface for boosted photocatalytic activity. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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