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Sensors 2012, 12(5), 5896-5905; doi:10.3390/s120505896

Calcium Oxide Matrices and Carbon Dioxide Sensors

1 Laboratories of Biophysics and Nanobiotechnology, Department of Medical Science, University of Genova, Via Pastore 3, Genova 16132, Italy 2 Nanoworld Institute, Fondazione EL.B.A. Nicolini, Largo Redaelli 7, Pradalunga, Bergamo 24100, Italy
* Author to whom correspondence should be addressed.
Received: 29 March 2012 / Revised: 3 May 2012 / Accepted: 4 May 2012 / Published: 8 May 2012
(This article belongs to the Special Issue Organics and Metal Oxide Hybrid Sensors)
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Homogeneous matrices of calcium oxide (CaO) were prepared by mixing this material with polyethylene glycol (PEG) acting as malleable inert support in order to obtain processable composites. Preliminary tests were carried out to assess the best concentration of CaO in the composite, individuated in the CaO/PEG weight ratio of 1/4. Experimental data highlighted that the composite was able to selectively detect carbon dioxide (CO2) via a nanogravimetric method by performing the experiments inside an atmosphere-controlled chamber filled with CO2. Furthermore, the composite material showed a linear absorption of CO2 as a function of the gas concentration inside the atmosphere-controlled chamber, thus paving the way for the possible use of these matrices for applications in the field of sensor devices for long-term evaluation of accumulated environmental CO2.
Keywords: sensors; carbon dioxide; calcium oxide; composites; nanogravimetry sensors; carbon dioxide; calcium oxide; composites; nanogravimetry
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Terencio, T.B.C.; Bavastrello, V.; Nicolini, C. Calcium Oxide Matrices and Carbon Dioxide Sensors. Sensors 2012, 12, 5896-5905.

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