Enhanced sensing response of Cd2+ substitution cobalt chromate ceramics for humidity sensors

Swathi, KM and Chethan, B and Kiran, B and Kumar, A and Nadaf, S and Laxmeshwar, SS and Savanur, HM and Al-Enizi, AM and Ubaidullah, M and Pandit, B and Gupta, M and Manjuntha, SO and Basavegowda, N and Angadi, VJ (2024) Enhanced sensing response of Cd2+ substitution cobalt chromate ceramics for humidity sensors. In: Journal of Materials Science: Materials in Electronics, 35 (2).

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Abstract

For the first time, we have prepared cadmium-doped cobalt chromate with chemical formula Co1-xCdxCr2O4 (where x = 0, 0.03, 0.06, 0.09, 0.12, and 0.15) nanoparticles by solution combustion method. To examine the structural and morphological changes of the prepared samples were subjected to characterise X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy (EDX). The XRD data demonstrate the formation of a single-phase cubic structure without an impurity peak emerging. Further, the strain and particle size components were calculated using the Williamson�Hall method and results are in good agreements with XRD results. The Cd-doped Co1-xCdxCr2O4 was tested to detect humidity in the relative humidity range of 11 to 99. The sample with the highest sensing response, Cd = 0.15, had response and recovery times of 35.6 and 6.5s, respectively, and a 99 sensing response. Therefore, based on our findings, the synthesised materials are appropriate for use in humidity sensor applications. © 2024, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Item Type:	Journal Article
Publication:	Journal of Materials Science: Materials in Electronics
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer.
Keywords:	Cadmium compounds; Chromates; Energy dispersive spectroscopy; Fourier transform infrared spectroscopy; Humidity sensors; Particle size; Scanning electron microscopy; X ray diffraction, Chemical formulae; Cubic structure; Electrons energy; Energy dispersive X ray spectroscopy; Morphological changes; Sensing response; Single phasis; Solution combustion method; X- ray diffractions; XRD, Cobalt compounds
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	01 Mar 2024 09:04
Last Modified:	01 Mar 2024 09:04
URI:	https://eprints.iisc.ac.in/id/eprint/83958

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