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SARA KHADEM CHARVADEH
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Volume 45 All articles Published: 24 March 2022 Article ID 0061
SARA KHADEM CHARVADEH SADAF NEJATINIA ABBAS BAGHERI KHATIBANI MOHAMMAD HADI AHMADI
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.
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Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
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Bulletin of Materials Science | News
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Dr Shanti Swarup Bhatnagar for Science and Technology
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