Abstract
A nanostructured gas sensors made of the Fe2O3:ZnO (60 : 40 wt %) composition were fabricated. The SEM image of the gas sensitive film showed that the particle sizes in the film are ranged from 20–50 nm. The gas sensitivity characteristics of the Fe2O3:ZnO sensor to hydrogen were studied at various operating temperatures (50–250°C) and in the presence of various hydrogen concentrations (75–2000 ppm) in the ambient air. The investigated Fe2O3:ZnO sensor showed sensitivity to hydrogen starting from a temperature of 50°C, and the maximum response was observed at an operating temperature of 100°C, at which the response exceeded 5000. The optimal combination of sensor gas sensitivity parameters was observed at an operating temperature of 200°C.
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The work was supported by the Science Committee of MESCS RA, in the frames of the research project No. 21APP-2J001.
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Translated by V.M. Aroutiounian
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Aleksanyan, M.S., Sayunts, A.G., Shahkhatuni, G.H. et al. Use of Nanostructured Fe2O3:ZnO Film for Detection of Hydrogen. J. Contemp. Phys. 57, 140–145 (2022). https://doi.org/10.3103/S1068337222020062
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DOI: https://doi.org/10.3103/S1068337222020062