Room temperature LPG resistive sensor based on the use of a few-layer graphene/SnO2 nanocomposite

Goutham, Solleti and Bykkam, Satish and Sadasivuni, Kishor Kumar and Devarai, Santhosh Kumar and Ahmadipour, Mohsen and Ahmad, Zainal Arifin and Rao, Kalagadda Venkateswara (2018) Room temperature LPG resistive sensor based on the use of a few-layer graphene/SnO2 nanocomposite. Microchimica Acta, 185 (1). ISSN 0026-3672

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A nanocomposite consisting of a few layers of graphene (FLG) and tin dioxide (SnO2) was prepared by ultrasound-assisted synthesis. The uniform SnO2 nanoparticles (NPs) on the FLG were characterized by X-ray diffraction in terms of lattice and phase structure. The functional groups present in the composite were analyzed by FTIR. Electron microscopy (HR-TEM and FE-SEM) was used to study the morphology. The effect of the fraction of FLG present in the nanocomposite was investigated. Sensitivity, selectivity and reproducibility towards resistive sensing of liquid propane gas (LPG) was characterized by the I-V method. The sensor with 1% of FLG on SnO2 operated at a typical voltage of 1 V performs best in giving a rapid and sensitive response even at 27 degrees C. This proves that the operating temperature of such sensors can be drastically decreased which is in contrast to conventional metal oxide LPG sensors.

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IITH Creators:
IITH CreatorsORCiD
Devarai, Santhosh KumarUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Few layered graphene, SnO2, Gas sensor, Liquid petroleum gas, Chemiresistive sensing
Subjects: Chemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: Team Library
Date Deposited: 01 Feb 2018 10:46
Last Modified: 14 Jan 2019 09:31
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