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Fabrication, characterization and enhanced sensing performance of graphene-TiO2 gas sensor device

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Abstract

Graphene-TiO2 nanocomposite layers (G-TiO2-NCLs) were prepared using sol–gel method along with spin coating deposition and applied for detection of CO2 gas. The physicochemical properties of G-TiO2-NCLs gas sensors were determined by X-Ray diffraction (XRD), ultra-violet visible spectroscopy (UV–Vis), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared-spectroscopy (FT-IR). The gas sensing properties of the prepared G-TiO2-NCLs was successfully demonstrated by detection of CO2 gas at different operating temperatures and gas concentrations. Both pristine TiO2 and G-TiO2-NCLs sensors showed a faster response at operating temperature of 200 °C. It was found that G-TiO2 gas sensors show higher response toward sensing CO2 gas compared with pristine TiO2 sensors at optimum temperature. The enhancement in the gas sensing performance of G-TiO2-NCLs can be ascribed to the introducing of graphene into the TiO2 matrix. The response of G-TiO2-NCLs gas sensors was maximum (1.34) when 0.001 g graphene was incorporated into the TiO2 matrix at 200 °C as an optimum operating temperature.

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Authors and Affiliations

  1. Department of Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran

    Mahdi Taymouri Amiri & Ali Akbar Ashkarran

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  1. Mahdi Taymouri Amiri
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  2. Ali Akbar Ashkarran
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Correspondence to Ali Akbar Ashkarran.

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Amiri, M.T., Ashkarran, A.A. Fabrication, characterization and enhanced sensing performance of graphene-TiO2 gas sensor device. J Mater Sci: Mater Electron 28, 9435–9441 (2017). https://doi.org/10.1007/s10854-017-6685-0

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  • DOI: https://doi.org/10.1007/s10854-017-6685-0

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