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Calcium Oxide Matrices and Carbon Dioxide Sensors
Laboratories of Biophysics and Nanobiotechnology, Department of Medical Science, University of Genova, Via Pastore 3, Genova 16132, Italy
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; in revised form: 3 May 2012 / Accepted: 4 May 2012 / Published: 8 May 2012
Abstract: 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
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MDPI and ACS Style
Terencio, T.B.C.; Bavastrello, V.; Nicolini, C. Calcium Oxide Matrices and Carbon Dioxide Sensors. Sensors 2012, 12, 5896-5905.
Terencio TBC, Bavastrello V, Nicolini C. Calcium Oxide Matrices and Carbon Dioxide Sensors. Sensors. 2012; 12(5):5896-5905.
Terencio, Tercio Bezerra Correia; Bavastrello, Valter; Nicolini, Claudio. 2012. "Calcium Oxide Matrices and Carbon Dioxide Sensors." Sensors 12, no. 5: 5896-5905.