Hydrogen Sulfide Gas Sensing Capabilities of Solution Processed Vanadium Pentoxide Nanosheets

Jha, Ravindra Kumar and Sakhuja, Neha and Jakhar, Samridhi and Bhat, Navakanta (2019) Hydrogen Sulfide Gas Sensing Capabilities of Solution Processed Vanadium Pentoxide Nanosheets. In: IEEE TRANSACTIONS ON NANOTECHNOLOGY, 18 . pp. 932-939.

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Abstract

Vanadium Pentoxide (V2O5) nanosheets, liquid exfoliated in ethanol, were used as sensing material for hydrogen sulfide (H2S) detection. The material properties such as morphology, phase, chemical signature were characterized using Field Emission electron microscopy (FESEM), Transmission electron microscopy (TEM), Atomic force microscopy (AFM), X-ray Diffraction (XRD), Raman Spectroscopy, X-ray photoelectron microscopy (XPS). These nanosheets were further dropcasted on Ti/Pt interdigitated electrode (IDE) to fabricate a chemiresistive gas sensing device. The sensors show excellent response towards H2S gas at an operating temperature of 350 degrees C, when operated in 500 ppb-4 ppm range. The response in this range was found to be varying linearly from 1.5% (for 500 ppb) to 12.8% (for 4 ppm). Response time and recovery time of 71 seconds and 104 seconds for 1 ppm H2S was observed. The hysteresis error (%) of the device was found to be +/- 4.21% which suggests it to be a good sensing material for H2S detection. The device was also tested on other parameters like repeatability, stability and reproducibility and it performs well in these tests indicating exfoliated V2O5 nanosheet as a potential sensing material for chemiresistive devices for H2S detection.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON NANOTECHNOLOGY
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	copyright for this article belongs to IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords:	Vanadium pentoxide; nanosheets; hydrogen sulfide; chemiresistive gas sensors; two dimensional oxides
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	21 Oct 2019 07:41
Last Modified:	21 Oct 2019 07:41
URI:	http://eprints.iisc.ac.in/id/eprint/63746

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