NDLI: Facile fabrication of ZnO nanocrystalline-modified graphene hybrid nanocomposite toward methane gas sensing application

Content Provider	Springer Nature Link
Author	Zhang, Dongzhi Yin, Nailiang Xia, Bokai
Copyright Year	2015
Abstract	In this paper, we synthetized a hybrid composite of zinc oxide (ZnO) nanocrystalline-decorated reduced graphene oxide (rGO) via a facile hydrothermal process, and fabricated a methane gas sensor by using the ZnO–rGO hybrid composite as sensing film coated on a ceramic tube with Ni–Cr heater. The presence of nanorod-shaped ZnO nanocrystalline and rGO nanosheets was characterized by scanning electron microscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy, UV–Vis diffuse reflectance and photoluminescence spectra measurement. The sensing properties of the ZnO–rGO film sensor were investigated by exposing to various concentration of methane gas at different temperature. It was found that the presented sensor exhibited unique advantages in methane gas sensing with concentration spanning from 100 to 4000 ppm, such as outstanding repeatability, fast response-recovery time as well as good selectivity, at an optimal operating temperature of 190 °C. The gas response of the ZnO–rGO hybrid composite was superior to that of the pure ZnO and rGO counterpart in methane gas sensing. The possible and proposed sensing mechanism for the sensor is mainly attributed to its nano-hybrid structure and special interactions at p–n heterojunction. This observed results highlight the ZnO–rGO hybrid composite as a candidate material for constructing methane gas sensors.
Starting Page	5937
Ending Page	5945
Page Count	9
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	26
Issue Number	8
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2015-05-13
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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