Reduced graphene oxide/ZnO nanocomposite for application in chemical gas sensors

Year: 2016

Authors: Galstyan V., Comini E., Kholmanov I., Faglia G., Sberveglieri G.

Autors Affiliation: Sensor Lab, CNR, National Institute of Optics (INO), Via Valotti 9, 25133 Brescia, Italy;
Sensor Lab, Department of Information Engineering, University of Brescia, Via Valotti 9, 25133 Brescia, Italy;
Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA

Abstract: Coupling of graphene-based materials with metal oxide nanostructures is an effective way to obtain composites with improved gas sensing properties. In this work, we prepared a hybrid structure based on graphene oxide (GO) and ZnO nanostructures. The morphological, compositional and structural analyses of the composite material have been investigated using scanning electron microscopy, X-ray diffraction spectroscopy, energy dispersive X-ray analysis and Raman spectroscopy. The gas sensing properties of the obtained structure have been studied towards nitrogen dioxide, hydrogen and methane at relatively low (about 200 degrees C) operating temperatures. It has been demonstrated that the reduced graphene oxide (RGO)/ZnO composites exhibit 40-50% better response to NO2 and H-2 compared to pure ZnO sensors. The obtained results show that the functionalization of the nanostructured ZnO with the RGO sheets is a promising strategy to develop chemical gas sensors with improved gas sensing properties.

Journal/Review: RSC ADVANCES

Volume: 6 (41)      Pages from: 34225  to: 34232

More Information: The research leading to these results has received funding from the following projects: “New approaches and methodologies for bioremediation of water contaminated by chlorinated aliphatic solvents (SUSBIOREM)” (funded by the National Research Council (CNR) and Lombardia Region); “MSP: Multi Sensor Platform for Smart Building Management” (grant agreement no. 611887, funded by the European Commission through its 7th Framework Programme); “FIRB – Oxides at the nanoscale: multifunctionality and applications” (Protocollo: RBAP115AYN, funded by the Italian Ministry of Education); “ORAMA” (grant agreement NMP3-LA-2010-246334, funded by the European Commission through its 7th Framework Programme); “WIROX: Oxide Nanostructures for Wireless Chemical Sensing” (PEOPLE MARIE CURIE ACTIONS, International Research Staff Exchange Scheme, Call: FP7-PEOPLE-2011-IRSES, 2012-2015).
KeyWords: Chemical sensors, Zinc oxide, graphene oxide
DOI: 10.1039/c6ra01913g

Citations: 94
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