Abstract
A high-performance methane gas sensor based on nickel oxide (NiO)/reduced graphene oxide (rGO) nanocomposite film was reported in this paper. The hydrothermal synthesized NiO/rGO hybrid nanocomposite was fabricated on a ceramic tube as sensing film. The nanostructures of the NiO/rGO nanocomposite film were characterized by scanning electron microscopy, X-ray diffraction and transmission electron microscope. The methane gas sensing behaviors of the sensor samples were investigated by exposing to various concentration of methane gas at different operating temperature. As a result, the presented sensor exhibited high-response, good repeatability and acceptable selectivity toward methane gas detection. The possible gas sensing mechanism of the proposed sensor was attributed to the Fermi energy band between rGO sheets and NiO nanoparticles. This observed results highlight the hydrothermal synthesized NiO/rGO nanocomposite film can be used as a candidate material for constructing methane sensors, given its simple process, practical usability and cost effectiveness.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant No. 51407200, 51405257), the Science and Technology Plan Project of Shandong Province (Grant No. 2014GSF117035), the Science and Technology Development Plan Project of Qingdao (Grant No. 13-1-4-179-jch), the Open Fund of National Engineering Laboratory for Ultra High Voltage Engineering Technology (Kunming, Guangzhou; Grant No. NEL201518), the Fundamental Research Funds for the Central Universities of China (Grant No. 15CX05041A), and the Science and Technology Project of Huangdao Zone, Qingdao, China (Grant No. 2014-1-51).
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Zhang, D., Chang, H., Li, P. et al. Characterization of nickel oxide decorated-reduced graphene oxide nanocomposite and its sensing properties toward methane gas detection. J Mater Sci: Mater Electron 27, 3723–3730 (2016). https://doi.org/10.1007/s10854-015-4214-6
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DOI: https://doi.org/10.1007/s10854-015-4214-6