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Sensors 2014, 14(9), 15802-15814; https://doi.org/10.3390/s140915802

Dynamic Response of CoSb2O6 Trirutile-Type Oxides in a CO2 Atmosphere at Low-Temperatures

1
Materials Science Graduate School, CUCEI (Centro Universitario de Ciencias Exactas e Ingenierías), University of Guadalajara, Blvd. M. García Barragán 1421, Guadalajara, Jalisco 44410, Mexico
2
Physics Department, CUCEI (Centro Universitario de Ciencias Exactas e Ingenierías), University of Guadalajara, Blvd. M. García Barragán 1421, Guadalajara, Jalisco 44410, Mexico
3
Faculty of Science, University of Colima, Bernal Díaz del Castillo 340, Colima, Colima 28045, Mexico
4
Faculty of Chemical Sciences, University of Colima, Km 9 Carretera Colima-Coquimatlán, Coquimatlán 28400, Colima, Mexico
*
Author to whom correspondence should be addressed.
Received: 23 July 2014 / Revised: 17 August 2014 / Accepted: 20 August 2014 / Published: 26 August 2014
(This article belongs to the Section Chemical Sensors)
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Abstract

Experimental work on the synthesis of the CoSb2O6 oxide and its CO2 sensing properties is presented here. The oxide was synthesized by a microwave-assisted colloidal method in presence of ethylenediamine after calcination at 600 °C. This CoSb2O6 oxide crystallized in a tetragonal structure with cell parameters and Å, and space group P42/mnm. To prove its physical, chemical and sensing properties, the oxide was subjected to a series of tests: Raman spectroscopy, Scanning Electron Microscopy (SEM) and impedance (Z) measurements. Microstructures, like columns, bars and hollow hemispheres, were observed. For the CO2 sensing test, a thick film of CoSb2O6 was used, measuring the impedance variations on the presence of air/CO2 flows (0.100 sccm/0.100 sccm) using AC (alternating current) signals in the frequency-range 0.1–100 kHz and low relative temperatures (250 and 300 °C). The CO2 sensing results were quite good. View Full-Text
Keywords: sensing properties; CoSb2O6; trirutile; chemical synthesis sensing properties; CoSb2O6; trirutile; chemical synthesis
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Guillén-Bonilla, A.; Rodríguez-Betancourtt, V.-M.; Flores-Martínez, M.; Blanco-Alonso, O.; Reyes-Gómez, J.; Gildo-Ortiz, L.; Guillén-Bonilla, H. Dynamic Response of CoSb2O6 Trirutile-Type Oxides in a CO2 Atmosphere at Low-Temperatures. Sensors 2014, 14, 15802-15814.

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