Synthesis and study of reduced graphene oxide substituted Bismuth oxide composite towards humidity sensors

Angadi, VJ and Chethan, B and Swathi, KM and Wang, S and Roy, N and Joo, SW and Pattar, V and Shaikh, SF and Prakash, C and Kumar, A and Ubaidullah, M and Atif, M (2024) Synthesis and study of reduced graphene oxide substituted Bismuth oxide composite towards humidity sensors. In: Journal of Materials Science: Materials in Electronics, 35 (30).

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Abstract

This study investigates the characteristics and performance of a composite material comprising bismuth oxide (Bi2O3) and reduced graphene oxide (rGO) at varying concentrations. The diffraction pattern for un-substituted α-Bi2O3 nanoparticles (NPs) showed major reflections corresponding to rGO crystal faces, with calculated lattice parameters of a = 5.849 à , b = 8.166 à , and c = 7.510 à . The substitution of α-Bi2O3 with rGO preserved the crystalline phase, and the material�s porosity increased with higher rGO concentrations, as verified by XRD and humidity testing. Notably, at a composition of 20 rGO (Bi 0.2), the composite demonstrated a significant reduction in resistance from 11 to 98 relative humidity (RH), showing an exponential decrease. The response time of the sensor was recorded at 9 s, with a recovery time of 12 s. The material exhibited exceptional humidity sensitivity, especially at higher rGO concentrations, making it highly suitable for humidity sensing applications. Furthermore, the sensor demonstrated high stability over a 60-day period, maintaining consistent performance. These findings highlight the potential of the Bi2O3-rGO composite for robust and reliable sensor applications under varying environmental conditions. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.

Item Type:	Journal Article
Publication:	Journal of Materials Science: Materials in Electronics
Publisher:	Springer
Additional Information:	The copyright for this article belongs to the publishers.
Keywords:	Crystal lattices; Crystalline materials; Environmental testing; Nanoclay; Reduced Graphene Oxide, reductions; Bismuth oxides; Composites material; Crystal face; Crystalline phasis; Oxide composites; Oxide crystals; Performance; Reduced graphene oxides; XRD, Humidity sensors
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	04 Dec 2024 17:19
Last Modified:	04 Dec 2024 17:19
URI:	http://eprints.iisc.ac.in/id/eprint/86897

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