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Title: Highly-sensitive and selective nitric oxide sensor based on electrolytically exfoliated graphene/flamespay-made SnO<inf>2</inf>nanocomposite films
Authors: Nantikan Tammanoon
Anurat Wisitsoraat
Chakrit Sriprachuabwong
Ditsayut Phokharatkul
Adisorn Tuantranont
Sukon Phanichphant
Chaikarn Liewhiran
Keywords: Biochemistry, Genetics and Molecular Biology
Materials Science
Physics and Astronomy
Issue Date: 1-Jul-2018
Abstract: © 2018, Chiang Mai University. All rights reserved. In this work, 0-5wt % electrolytically exfoliated graphene/flame-spray-made undoped SnO2nanocomposites were systematically studied for NO sensing at low working temperatures. Characterizations by X-ray diffraction and transmission/scanning electron microscopy demonstrated that multilayer graphene sheets were widely distributed within spheriodal nanoparticles having polycrystalline tetragonal SnO2phase. The sensing films fabricated by powder pasting and spin coating techniques were tested toward 0.125-5 ppm NO at temperatures ranging from 25°C to 350°C in dry air. Gas-sensing results showed that the optimal graphene loading level of 0.5 wt% provided an ultrahigh response of ∼7,275 toward 5 ppm of NO and good recovery stabilization at a low optimal operating temperature of 200°C. Furthermore, the sensors displayed high NO selectivity against NO2, H2, C3H6O, H2S and CH4. Therefore, the electrolytically exfoliated graphene-loaded FSP-made SnO2sensor is a highly promising candidate for sensitive and selective detections of NO in biomedical diagnostic applications.
ISSN: 01252526
Appears in Collections:CMUL: Journal Articles

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