材料科学
光催化
石墨烯
异质结
制氢
贵金属
可见光谱
半导体
热液循环
化学工程
氢
载流子
量子点
纳米技术
光电子学
金属
催化作用
冶金
工程类
有机化学
化学
生物化学
作者
Puttaswamy Madhusudan,Run Shi,Bananakere Nanjegowda Chandrashekar,Shengling Xiang,Smitha Ankanahalli Shankaregowda,Weijun Wang,Haichao Zhang,Xian Zhang,Abbas Amini,Chun Cheng
标识
DOI:10.1002/admi.202000010
摘要
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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