Sensing behavior of SnO2/reduced graphene oxide nanocomposites toward NO2
authors Neri, G; Leonardi, SG; Latino, M; Donato, N; Baek, S; Conte, DE; Russo, PA; Pinna, N
nationality International
journal SENSORS AND ACTUATORS B-CHEMICAL
author keywords Reduced graphene oxide; Tin oxide; Nitrogen dioxide microwave-assisted synthesis
keywords ION BATTERIES; GAS SENSORS; SHEETS; FILMS; CO
abstract Crystalline SnO2/reduced graphene oxide (RGO) nanocomposites were synthesized by a one-pot microwave-assisted non-aqueous sol gel method, in which partially reduction of the graphene oxide and nanoparticle formation occurs simultaneously. Composite samples with different SnO2 loadings on the RGO were prepared and characterized by TEM, XRD, TGA-DSC and FT-IR. Chemoresistive devices, consisting of a thick layer of the samples synthesized on alumina substrates provided with Pt interdigitated electrodes, were fabricated and their electrical and NO2 sensing characteristics investigated. The results obtained have shown the possibility of a fine tuning of the sensing characteristics of the devices fabricated by simply controlling the amount of metal oxide nanoparticles loaded onto the reduced graphene oxide sheets. This was explained on the basis of the critical role played by the n-SnO2/p-RGO heterojunction formed on the composite materials. (C) 2012 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0925-4005
year published 2013
volume 179
beginning page 61
ending page 68
digital object identifier (doi) 10.1016/j.snb.2012.10.031
web of science category Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
subject category Chemistry; Electrochemistry; Instruments & Instrumentation
unique article identifier WOS:000316588100007
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journal impact factor 5.667
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