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Sensors 2014, 14(4), 6806-6818; doi:10.3390/s140406806
Article

Ozone Sensing Based on Palladium Decorated Carbon Nanotubes

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Received: 20 February 2014 / Revised: 4 April 2014 / Accepted: 8 April 2014 / Published: 14 April 2014
(This article belongs to the Section Physical Sensors)
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Abstract

Multiwall carbon nanotubes (MWCNTs) were easily and efficiently decorated with Pd nanoparticles through a vapor-phase impregnation-decomposition method starting from palladium acetylacetonates. The sensor device consisted on a film of sensitive material (MWCNTs-Pd) deposited by drop coating on platinum interdigitated electrodes on a SiO2 substrate. The sensor exhibited a resistance change to ozone (O3) with a response time of 60 s at different temperatures and the capability of detecting concentrations up to 20 ppb. The sensor shows the best response when exposed to O3 at 120 °C. The device shows a very reproducible sensor performance, with high repeatability, full recovery and efficient response.
Keywords: gas sensor; ozone; multiwall carbon nanotubes; Pd nanoparticles gas sensor; ozone; multiwall carbon nanotubes; Pd nanoparticles
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Colindres, S.C.; Aguir, K.; Cervantes Sodi, F.; Vargas, L.V.; Salazar, J.A.M.; Febles, V.G. Ozone Sensing Based on Palladium Decorated Carbon Nanotubes. Sensors 2014, 14, 6806-6818.

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