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Journal of Nanomaterials
Volume 2015, Article ID 308465, 9 pages
http://dx.doi.org/10.1155/2015/308465
Research Article

Sensitivity of Mesoporous CoSb2O6 Nanoparticles to Gaseous CO and C3H8 at Low Temperatures

1Facultad de Ciencias Químicas, Universidad de Colima, 28400 Coquimatlán, COL, Mexico
2Facultad de Ciencias, Universidad de Colima, 28045 Colima, COL, Mexico
3Departamento de Ingeniería Eléctrica-SEES, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, 07360 México, DF, Mexico
4Departamento de Física, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, 07360 México, DF, Mexico
5Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, 44410 Guadalajara, JAL, Mexico

Received 14 November 2014; Accepted 7 January 2015

Academic Editor: Rakesh K. Joshi

Copyright © 2015 Héctor Guillén-Bonilla et al. 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.

Abstract

Mesoporous CoSb2O6 nanoparticles, synthesized through a nonaqueous method (using cobalt nitrate, antimony trichloride, ethylenediamine, and ethanol as a solvent), were tested to establish their sensitivity to CO and C3H8 atmospheres at relatively low temperatures. The precursor material was dried at 200°C and calcined at 600°C. X-ray diffraction and scanning electron microscopy were employed to verify the existence of crystal phases () and the morphology of this trirutile-type CoSb2O6 oxide. Pyramidal and cubic shaped crystals (average size: 41.1 nm), embedded in the material’s surface, were identified. Mesopores (average size: 6.5 nm) on the nanoparticles’ surface were observed by means of transmission electron microscopy. The best sensitivity of the CoSb2O6 in a CO atmosphere was at the relatively low temperatures of 250 and 350°C, whereas, in a C3H8 atmosphere, the sensitivity increased uniformly with temperature. These results encourage using the CoSb2O6 nanoparticles as gas sensors.