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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/045/0061

    • Keywords

       

      Ethanol sensing; sol–gel method; zinc oxide-based sensor; graphene and copper doping.

    • Abstract

       

      Pure zinc oxide, graphene-, copper- and copper/graphene-doped zinc oxide samples were synthesized by the sol–gel technique. The sol–gel prepared samples have been studied by X-ray diffraction, field-emission scanning electron microscopy and Fourier transform infrared spectroscopy. The gas-sensing performance of the samples was examined through an electric circuit towards different vapours (i.e., ethanol, methanol, acetone and isopropanol). It was observed that the sensitivity was affected by graphene and copper. The main ethanol sensing features of the samples were measured and compared with each other. The sensitivity and the time of response and recovery of the sensing material were commonly improved after doping. Based on the results, the doped samples had a more acceptable status than the ZnO sample and particularly, the sample with both graphene and copper had a peculiar attitude due to sensitivity enhancement and response/recovery time reduction. The copper/graphene-doped zinc oxide can be a good replacement for a pure zinc oxide gas sensor.

    • Author Affiliations

       

      SARA KHADEM CHARVADEH SADAF NEJATINIA ABBAS BAGHERI KHATIBANI1 MOHAMMAD HADI AHMADI

      1. Nano Research Lab, Lahijan Branch, Islamic Azad University, P.O. Box 1616, Lahijan, Iran

    • Dates

       
      Published
      24 March 2022
      Manuscript received
      2 August 2021
      Accepted
      27 November 2021
      Final version published online
      24 March 2022

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