Gas Sensors Based on Porous Ceramic Bodies of MSnO3 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 MSnO3 system (M = Ba, Ca, Zn) synthesized by a chemical route. The performance and reliability of the sensitive materials in the presence of diff...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2022-04, Vol.27 (9), p.2889
Main Authors: Ochoa-Muñoz, Yasser H., Mejía de Gutiérrez, Ruby, Rodríguez-Páez, Jorge E., Gràcia, Isabel, Vallejos, Stella
Format: Article
Language:English
Subjects:
Acetone
Barium stannate
BaSnO3
Calcium
CaSnO3
Ethanol
Gas detectors
Gas sensors
Gases
Low concentrations
Morphology
Nanoparticles
Nitrogen dioxide
Organic compounds
Perovskites
Porosity
porous ceramic
Rheology
Screen printing
Selectivity
Sensors
Sintering
Slip casting
Stability analysis
Toluene
VOCs
Volatile organic compounds
Zinc
Zinc oxides
Zinc stannate
ZnSnO3
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Summary:In this work, the gas-sensing functionality of porous ceramic bodies formed by the slip casting technique was studied using perovskite nanoparticles of an MSnO3 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, H2 and NO2) were analysed. The ZnSnO3, BaSnO3, and CaSnO3 sensors showed sensitivities of 40, 16, and 8% ppm−1 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 ZnSnO3 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 ZnSnO3.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules27092889