Fabrication of H 2 Gas Sensor Based on ZnO Nanarod Arrays by a Sonochemical Method

We report a simple method for fabricating ZnO gas sensors via a sonochemical route and their H_2 gas sensing properties. Vertically aligned ZnO nanorod arrays as a sensing material were synthesized on a Pt-electrode patterned alumina substrate under ambient conditions. The advantage of the proposed...

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Bibliographic Details
Published inBulletin of the Korean Chemical Society Vol. 32; no. 10; pp. 3735 - 3737
Main Authors Lee, Mi-Sun, Oh, Eu-Gene, Jeong, Soo-Hwan
Format Journal Article
LanguageEnglish
Published 대한화학회 20.10.2011
Subjects
화학
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Summary:We report a simple method for fabricating ZnO gas sensors via a sonochemical route and their H_2 gas sensing properties. Vertically aligned ZnO nanorod arrays as a sensing material were synthesized on a Pt-electrode patterned alumina substrate under ambient conditions. The advantage of the proposed method is a high speed of processing. The gas sensor based on ZnO nanorod arrays with large specific surface area showed a high response to H_2 and a detection limit of 70 ppm at 250 ^oC. Also, their response and recovery time were relatively short and a complete regeneration was observed. A mechanism for sensing H2 gas on the surface of ZnO nanorods is proposed. KCI Citation Count: 10
Bibliography:G704-000067.2011.32.10.019
ISSN:0253-2964
1229-5949
DOI:10.5012/bkcs.2011.32.10.3735