Development of a Ferrite Film Based Solid State Sensor System for Ultra Low Concentration Hydrogen Sulfide Gas Detection

Jha, RK and Nanda, A and Sai, R and Kishore, K and Yadav, A and Kahmei, RDR and Bhat, N (2022) Development of a Ferrite Film Based Solid State Sensor System for Ultra Low Concentration Hydrogen Sulfide Gas Detection. In: IEEE Sensors Journal, 22 (9). pp. 8402-8409.

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Abstract

We report on a selective hydrogen sulfide gas sensor based on zinc ferrite film which is obtained by a microwave-assisted solvothermal deposition route. The response of the chemiresistive device is found to be in the range of 1872 - 90 for 5.6 ppm - 0.3 ppm of H2S gas at an operating temperature of 250°C. The density functional theory studies suggest physisorption of the H2S molecules at the partially-inverted ZnFe2O4 surface as the reason behind the fast rise (of the order of 40 sec) and fall time (of the order of 70 sec) with complete recovery of the device. Finally, a dual-differential subtractor based auto-balancing interface circuit is proposed to drive this sensor which is advantageous in terms of accuracy and particularly suitable for a device such as ours, which has a wide dynamic range.

Item Type:	Journal Article
Publication:	IEEE Sensors Journal
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Density functional theory; Ferrite; Hydrogen sulfide; Iron; Iron compounds; Microwave sensors; Phase interfaces; Sulfur determination; Temperature measurement; Zinc; Zinc compounds, Auto-balancing interface circuit; Chemiresistive sensors; Density-functional-theory; Dual differential subtractor; Ferrite; Ferrite films; Hydrogen sulfide gas; Interface circuits; Microwave synthesis; Subtractor, Timing circuits
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	24 Jun 2022 11:29
Last Modified:	24 Jun 2022 11:29
URI:	https://eprints.iisc.ac.in/id/eprint/73664

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