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Conference papers
Influence of Humidity on the CO Sensitivity of a New Gas Sensor Based on SnO2 Nanoparticles Surface-Doped with Palladium and Platinum
Abstract : In this paper, we show the influence of two doping agents Palladium and Platinum on the sensitivity for CO sensing of the nanoparticular SnO2 sensors at an operating temperature of 450°C. It is well known that the evolution of the conductance of the sensitive layer is largely modified by doping. A study carried out to measure the influence of humidity demonstrates that if un-doped sensors show a variation of same sign but less important than in dry air, doped sensors display a very different behavior. Indeed, we obtain a point of null sensitivity between 0 and 10%RH (RH = relative humidity) and a strong inverse sensitivity above 15% RH. These results demonstrate the presence of unexpectedly different chemical operating modes for CO sensing according to the rate of humidity.
Cited literature [6 references]
https://hal.laas.fr/hal-02160594
Contributor : Philippe Menini <>
Submitted on : Wednesday, June 19, 2019 - 6:44:21 PM
Last modification on : Wednesday, November 4, 2020 - 7:08:03 PM
Contributor : Philippe Menini <>
Submitted on : Wednesday, June 19, 2019 - 6:44:21 PM
Last modification on : Wednesday, November 4, 2020 - 7:08:03 PM
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