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Gas Sensors Based on Porous Ceramic Bodies of MSnO 3 Perovskites (M = Ba, Ca, Zn): Formation and Sensing Properties towards Ethanol, Acetone, and Toluene Vapours

In this work, the gas-sensing functionality of porous ceramic bodies formed by the slip casting technique was studied using perovskite nanoparticles of an MSnO system (M = Ba, Ca, Zn) synthesized by a chemical route. The performance and reliability of the sensitive materials in the presence of diffe...

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Published in:Molecules (Basel, Switzerland) Switzerland), 2022-04, Vol.27 (9)
Main Authors: Ochoa-Muñoz, Yasser H, Mejía de Gutiérrez, Ruby, Rodríguez-Páez, Jorge E, Gràcia, Isabel, Vallejos, Stella
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container_title Molecules (Basel, Switzerland)
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creator Ochoa-Muñoz, Yasser H
Mejía de Gutiérrez, Ruby
Rodríguez-Páez, Jorge E
Gràcia, Isabel
Vallejos, Stella
description In this work, the gas-sensing functionality of porous ceramic bodies formed by the slip casting technique was studied using perovskite nanoparticles of an MSnO system (M = Ba, Ca, Zn) synthesized by a chemical route. The performance and reliability of the sensitive materials in the presence of different volatile organic compounds (acetone, ethanol, and toluene), and other gases (CO, H and NO ) were analysed. The ZnSnO , BaSnO , and CaSnO sensors showed sensitivities of 40, 16, and 8% ppm towards acetone, ethanol, and toluene vapours, respectively. Good repeatability and selectivity were also observed for these gaseous analytes, as well as excellent stability for a period of 120 days. The shortest response times were recorded for the ZnSnO sensors (e.g., 4 s for 80 ppm acetone) with marked responses to low concentrations of acetone (1000 ppb). These results are attributed to the porosity of the sensitive materials, which favours the diffusion of gases, induces surface defects, and provides greater surface area and good sensitivity to acetone, as is seen in the case of ZnSnO .
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title Gas Sensors Based on Porous Ceramic Bodies of MSnO 3 Perovskites (M = Ba, Ca, Zn): Formation and Sensing Properties towards Ethanol, Acetone, and Toluene Vapours
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