期刊
NEW JOURNAL OF CHEMISTRY
卷 41, 期 11, 页码 4662-4671出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nj04022e
关键词
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资金
- Department of Science and Technology (DST), New Delhi, India [SR/FTP/PS-066/2010]
- Department of Physics and Meteorology, IIT Kharagpur
Herein, we report the in situ synthesis of zinc selenide (ZnSe)-decorated reduced graphene oxide (RGO) by a simple one-step solvothermal reaction for application in large-area, thin-film photodetector devices and photocatalytic 4-nitrophenol degradation. The photoresponsivity of the RGO-ZnSe photodetector is three orders of magnitude higher than that of controlled ZnSe. The ac transport mechanism in the composite reveals that its electrical conduction is modulated by a temperature-independent universal function. An EIS study confirmed the influence of RGO on the conductivity and charge transfer in the RGO-ZnSe composite. The photocatalytic degradation efficiency of the composite is four times higher than that of controlled ZnSe. In the RGO-ZnSe composite, RGO acts as a solid-state electron mediator, which efficiently collects the photo-induced electrons from the conduction band of ZnSe and subsequently hinders electron-hole recombination in ZnSe. This study explores the role of RGO-ZnSe synergy in achieving better photoresponse and photocatalytic performance. The RGO-ZnSe composite may lead to new possibilities in solar energy-harvesting applications and photocatalytic degradation of different non-self-sensitizing water pollutants.
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