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Gas Sensing Behavior of Mesoporous SiOC Glasses
Author(s) -
Karakuscu Aylin,
Ponzoni Andrea,
Aravind Parakkulam R.,
Sberveglieri Giorgio,
Soraru Gian D.
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12491
Subject(s) - mesoporous material , aerogel , materials science , acetone , pyrolysis , chemical engineering , nanotechnology , chemistry , organic chemistry , catalysis , engineering
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 m 2 /g with pore size in the 2–20 nm range. SiOC sensor shows good response to 5 ppm NO 2 at 300°C. NO 2 response completely disappears at 400°C, and from this temperature SiOC sensor starts respond to H 2 . The optimum sensitivity for H 2 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.