Journal
ADVANCED MATERIALS INTERFACES
Volume 7, Issue 12, Pages -Publisher
WILEY
DOI: 10.1002/admi.202000010
Keywords
hydrogen evolution; MoS2 nanosheets; photocatalysis; photodeposition; ZnxCd1-xS heterojunction
Funding
- Guangdong Natural Science Funds for Distinguished Young Scholars [2015A030306044]
- National Natural Science Foundation of China [51776094, 51406075]
- Guangdong-Hong Kong joint innovation project [2016A050503012]
- National Key Research and Development Project from the Ministry of Science and Technology [2016YFA0202400, 2016YFA0202404]
- Peacock Team Project funding from Shenzhen Science and Technology Innovation Committee [KQTD2015033110182370]
- Training Program for Outstanding Young Teachers at Higher Education Institutions of Guangdong Province [YQ2015151]
- Guangdong Provincial Key Laboratory of Energy Materials for Electric Power [2018B030322001]
- Guangdong High-Level Personnel of Special Support Program-Outstanding Young Scholar in Science and Technology Innovation [2015TQ01C543]
- Basic Research Project of Science and Technology Plan of Shenzhen [JCYJ20180504165655180]
- Presidential Fund of Shenzhen Municipality
- Development and Reform Commission of Shenzhen Municipality
- Southern University of Science and Technology [2019X33, 2019S11, 2019G03]
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Solar water splitting using semiconductor photocatalysts is considered to be one of the economical and significant techniques for hydrogen evolution. In this study, graphene-ZnxCd1-xS (ZCS) heterojunction is fabricated by hydrothermal method followed by simple photodeposition of ultrathin few layers of molybdenum sulfide (MoS2) nanosheets. The results show that compared with pristine ZCS and 1 wt% graphene mixed ZCS photocatalysts, the 1 wt% graphene and 1 wt% MoS2 photodeposited ZCS composited sample shows 39.5 mmol h(-1) g(-1) hydrogen production activity, which is 6.9 and 1.9 times significantly higher, respectively, with an apparent quantum yield of 53% at 420 nm visible light is recorded. The improved photocatalytic activity can be attributed to the formation of heterostructure interface between p-type MoS2 nanosheets with n-type ZCS host, which allows for the faster transfer of the photogenerated electrons and thus significantly promotes the separation of photogenerated charge carriers.
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