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Title: Highly selective room temperature NO2 gas sensor based on rGO-ZnO composite
Authors: Jyoti
Kanaujiya N.
Varma, Ghanshyam Das
Shekhawat M.S.
Bhardwaj S.
Suthar B.
Published in: AIP Conference Proceedings
2nd International Conference on Condensed Matter and Applied Physics, ICC 2017
Abstract: Blending metal oxide nanoparticles with graphene or its derivatives can greatly enhance gas sensing characteristics. In the present work, ZnO nanoparticles have been synthesized via reflux method. Thin films of reduced graphene oxide (rGO) and composite of rGO-ZnO have been fabricated by drop casting method for gas sensing application. The samples have been characterized by X-ray diffraction (XRD) and Field-emission scanning electron microscope (FESEM) for the structural and morphological studies respectively. Sensing measurements have been carried out for the composite film of rGO-ZnO for different concentrations of NO2 ranging from 4 to 100 ppm. Effect of increasing temperature on the sensing performance has also been studied and the rGO-ZnO composite sensor shows maximum percentage response at room temperature. The limit of detection (LOD) for rGO-ZnO composite sensor is 4ppm and it exhibits a high response of 48.4% for 40 ppm NO2 at room temperature. To check the selectivity of the composite sensor, sensor film has been exposed to 40 ppm different gases like CO, NH3, H2S and Cl2 at room temperature and the sensor respond negligibly to these gases. The present work suggests that rGO-ZnO composite material can be a better candidate for fabrication of highly selective room temperature NO2 gas sensor. © 2018 Author(s).
Citation: AIP Conference Proceedings (2018), 1953
Issue Date: 2018
Publisher: American Institute of Physics Inc.
ISBN: 9780735416482
ISSN: 0094243X
Author Scopus IDs: 57214348043
Author Affiliations: Jyoti, Department of Physics, Indian Institute of Technology, Roorkee, 247667, India
Kanaujiya, N., Department of Physics, Indian Institute of Technology, Roorkee, 247667, India
Varma, G.D., Department of Physics, Indian Institute of Technology, Roorkee, 247667, India
Funding Details: One of the authors, Jyoti is grateful to MHRD (Government of India) for the award of fellowship. Ministry of Human Resource Development, MHRD; Ministry of Coal, Government of India
Corresponding Author: Varma, G.D.; Department of Physics, India; email:
Appears in Collections:Conference Publications [PH]

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