| 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" |
| Author(s): | Ochoa-Munoz YH; Mejia de Gutierrez R; Rodriguez-Paez JE; Gracia I; Vallejos S; |
| Address: | "Composites Materials Group (GMC-CENM), Universidad del Valle, Cali 76001, Colombia. CYTEMAC Group, Universidad del Cauca, Popayan 190003, Colombia. Institute of Microelectronics of Barcelona (IMB-CNM, CSIC), 08193 Bellaterra, Spain" |
| DOI: | 10.3390/molecules27092889 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "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(3) 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(2) and NO(2)) were analysed. The ZnSnO(3), BaSnO(3), and CaSnO(3) 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 ZnSnO(3) 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(3)" |
| Keywords: | BaSnO3 CaSnO3 ZnSnO3 gas sensors perovskites porous ceramic; |
| Notes: | "PubMed-not-MEDLINEOchoa-Munoz, Yasser H Mejia de Gutierrez, Ruby Rodriguez-Paez, Jorge E Gracia, Isabel Vallejos, Stella eng 21049/University of Valle/ Call 757-2016/Colciencias/ Switzerland 2022/05/15 Molecules. 2022 Apr 30; 27(9):2889. doi: 10.3390/molecules27092889" |
