Abstract
SnO2 has become one of the hot materials for research at this stage due to the advantages of simple preparation, low cost and stable properties. In this study, SnO2/SiO2 nanocomposites were prepared by the sol-gel method. The structure, properties and morphology of the SnO2 nanoparticles were determined by HRTEM, SEM, XPS FTIR and XRD characterization. Compared with the pure SnO2 material, the SnO2/SiO2 composite has superior gas sensing properties to triethylamine. The test results demonstrate that the optimal temperature of the SnO2/SiO2 sensor is 280 degrees C, which is 45 degrees C lower than before doping. At 280 degrees C, the sensitivity to 100 ppm triethylamine was 18, which was 2.4 times higher than that before doping. The SnO2/SiO2 sensor can detect triethylamine with a minimum concentration of 500 ppb. In addition, the gas-sensitive mechanism of SnO2/SiO2 to triethylamine was illustrated. (C) 2021 Elsevier B.V. All rights reserved.
NSTL
Elsevier