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Published in: Journal of Materials Science: Materials in Electronics 20/2021

18-09-2021

Effect of Pt catalyst on the sensor performance of WO\(_3\) nanoflakes towards hazardous gases

Authors: Onur Alev, Serkan Büyükköse

Published in: Journal of Materials Science: Materials in Electronics | Issue 20/2021

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Abstract

Nobel metal functionalized chemiresistive type metal-oxide sensors were fabricated and tested against hazardous gases such as acetone, ethanol, hydrogen sulfide, hydrogen cyanide and dimethyl methylphosphonate. WO\(_3\) nanoflakes (NFs) were fabricated on Al\(_2\)O\(_3\) substrates by a facile hydrothermal route. 2D nanoflakes randomly aligned and uniformly covered on the substrate surface, and the thickness of the NFs were found approximately 100 nm. Then, Pt was loaded on WO\(_3\) nanoflakes by RF sputtering method. According to the sensor tests, Pt modification tremendously improved the sensor performance of nanoflakes against acetone gas in terms of sensor response, selectivity among the measured gases and operation temperature. The spillover effect of Pt increased the sensing response and the sensor was able to selectively detect acetone with 237 particle per billion (ppb) at operation temperature of 250 \(^{\circ }\)C. Pt functionalization suppresses the sensor responses of NFs against gases (ethanol, hydrogen sulfide, hydrogen cyanide and dimethyl methylphosphonate) other than acetone. While pristine NFs sensor was able to sense these gases at low temperatures, Pt-functionalized WO\(_3\) NFs did not sense at temperatures lower than 200 \(^{\circ }\)C by giving rise to the selectivity of the sensor against acetone.

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Metadata
Title
Effect of Pt catalyst on the sensor performance of WO nanoflakes towards hazardous gases
Authors
Onur Alev
Serkan Büyükköse
Publication date
18-09-2021
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 20/2021
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-021-06997-x

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