Calcium Oxide Matrices and Carbon Dioxide Sensors

Sensors

Tercio Bezerra Correia Terencio¹  Valter Bavastrello¹ 

[1] Laboratories of Biophysics and Nanobiotechnology, Department of Medical Science, University of Genova, Via Pastore 3, Genova 16132, Italy; E-Mails:

关键词: sensors;    carbon dioxide;    calcium oxide;    composites;    nanogravimetry;   

DOI  :  10.3390/s120505896

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.