Highly NO2 sensitive caesium doped graphene oxide conductometric sensors

Piloto, Carlo, Notarianni, Marco, Shafiei, Mahnaz, Taran, Elena, Galpaya, Dilini, Yan, Cheng, & Motta, Nunzio (2014) Highly NO2 sensitive caesium doped graphene oxide conductometric sensors. Beilstein Journal of Nanotechnology, 5, pp. 1073-1081.

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Abstract

Here we report on the synthesis of caesium doped graphene oxide (GO-Cs) and its application to the development of a novel NO2 gas sensor. The GO, synthesized by oxidation of graphite through chemical treatment, was doped with Cs by thermal solid-state reaction. The samples, dispersed in DI water by sonication, have been drop-casted on standard interdigitated Pt electrodes. The response of both pristine and Cs doped GO to NO2 at room temperature is studied by varying the gas concentration. The developed GO-Cs sensor shows a higher response to NO2 than the pristine GO based sensor due to the oxygen functional groups. The detection limit measured with GO-Cs sensor is ≈90 ppb.

Impact and interest:

7 citations in Scopus
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9 citations in Web of Science®

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ID Code: 73674
Item Type: Journal Article
Refereed: Yes
Keywords: caesium, conductometric, doping, drop casting, gas sensor, graphene oxide, highly sensitive, nitrogen dioxide
DOI: 10.3762/bjnano.5.120
ISSN: 2190-4286
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100) > Sensor Technology (Chemical aspects) (030107)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute for Future Environments
Funding:
Copyright Owner: Copyright 2014 Piloto et al; licensee Beilstein-Institut.
Deposited On: 10 Jul 2014 23:47
Last Modified: 13 Sep 2016 20:55

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