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

Ozone Sensing Based on Palladium Decorated Carbon Nanotubes

1,* , 2
,
3
,
4
,
3
 and
1
1 Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, 07730 D.F., Mexico 2 Aix-Marseille Université, CNRS, UMR 7334, Av. E.N. Niémen 13397, Marseille, France 3 Departamento de Física y Matemáticas, Universidad Iberoamericana, Prolongación Paseo de Reforma 880, Lomas de Santa Fe, 011219 D.F., Mexico 4 Instituto Politécnico Nacional, Centro de Investigación en Computación, Av. Juan de Dios Batiz s/n Col. Nueva Industrial Vallejo 07738 D.F., Mexico
* Author to whom correspondence should be addressed.
Received: 20 February 2014 / Revised: 4 April 2014 / Accepted: 8 April 2014 / Published: 14 April 2014
(This article belongs to the Section Chemical 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 (CC BY 3.0).

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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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