Abstract
Mixed nanoparticle films of SnO1.8: Ag prepared by the gas phase condensation method using an aerosol route have been used for the detection of CO and CH4. Particle size as estimated by transmission electron microscopy is 20 nm for both SnO1.8and Ag nanoparticles. The gas-sensing behavior of the films for these gases has been studied in detail as a function of Ag concentration in the films. A study has been made in order to distinguish the size effect and specific surface area effect in the ethanol gas-sensing behavior of SnO1.8: Ag mixed nanoparticle films. This distinction, which has not been possible using the traditional methods of the sensor fabrication, gives evidence of the dominance of size effect of the metal dopant over the surface area effect in the gas sensing of the films. The sensors show also an increased sensor signal with increase of Ag concentration in the films for CO and CH4. It is observed from the comparative study of the sensing behavior of SnO1.8: Ag films for CO and CH4that the sensors are more sensitive towards CO as compared to CH4. The mixed nanoparticle films were also used for the detection of CO at 100 ppm level.
Highlights
Recommended by Masamichi YoshimuraMixed nanoparticle films of SnO1.8 : Ag prepared by the gas phase condensation method using an aerosol route have been used for the detection of CO and CH4
Several methods have been used to prepare metal oxides with high surface area for conductive gas sensor applications.Conductive sensors change their conductivity when reacting with the oxidizing or reducing gases
A study has been made in order to distinguish the size effect and specific surface area effect in the ethanol gas-sensing behavior of SnO1.8 : Ag mixed nanoparticle films
Summary
Mixed nanoparticle films of SnO1.8 : Ag prepared by the gas phase condensation method using an aerosol route have been used for the detection of CO and CH4. A study has been made in order to distinguish the size effect and specific surface area effect in the ethanol gas-sensing behavior of SnO1.8 : Ag mixed nanoparticle films. This distinction, which has not been possible using the traditional methods of the sensor fabrication, gives evidence of the dominance of size effect of the metal dopant over the surface area effect in the gas sensing of the films. The sensors show an increased sensor signal with increase of Ag concentration in the films for CO and CH4 It is observed from the comparative study of the sensing behavior of SnO1.8 : Ag films for CO and CH4 that the sensors are more sensitive towards CO as compared to CH4. License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
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