Gas Sensing Behavior of Mesoporous SiOC Glasses

In this study, for the first time, we report the gas sensing behavior of aerogel‐derived silicon oxycarbide (SiOC) glasses. The SiOC glass pyrolyzed at 1400°C has specific surface area of 150 m2/g with pore size in the 2–20 nm range. SiOC sensor shows good response to 5 ppm NO2 at 300°C. NO2 respons...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2013-08, Vol.96 (8), p.2366-2369
Main Authors: Karakuscu, Aylin, Ponzoni, Andrea, Aravind, Parakkulam R., Sberveglieri, Giorgio, Soraru, Gian D.
Format: Article
Language:English
Subjects:
Acetone
Carbon monoxide
Ceramics
Gas sensors
Gases
Glass
Nitrogen dioxide
Sensors
Silicon
Silicon dioxide
Temperature effects
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Summary:In this study, for the first time, we report the gas sensing behavior of aerogel‐derived silicon oxycarbide (SiOC) glasses. The SiOC glass pyrolyzed at 1400°C has specific surface area of 150 m2/g with pore size in the 2–20 nm range. SiOC sensor shows good response to 5 ppm NO2 at 300°C. NO2 response completely disappears at 400°C, and from this temperature SiOC sensor starts respond to H2. The optimum sensitivity for H2 is obtained at 500°C. SiOC sensor is very selective; it is not sensitive to other gases such as acetone vapor or CO, even at high concentrations.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.12491