Gas sensing properties of quantum-sized ZnO nanoparticles for NO 2

Shouli Bai, Jingwei Hu, Xiaoyan Xu, Ruixian Luo, Dianqing Li, Aifan Chen, Chung Chiun Liu

研究成果: 雜誌貢獻期刊論文同行評審

13 引文 斯高帕斯(Scopus)

摘要

Quantum-sized ZnO nanoparticles with crystallite size about 6 nm were successfully synthesized by low temperature sol-gel process using tetraethylorthosillicate (TEOS) as capping agent to prohibit the crystallite aggregating and Ostwald ripening as well as accelerate the ZnO crystalline formation. The crystallite size was the smallest under the synthesized condition of pH=8. The appropriate calcination temperature for as-synthesized quantum-sized ZnO was 400 °C for 1 h. The ZnO sensor exhibited the highest response of 264 to 40 ppm NO 2 and the highest selectivity of 8.8 and 13.7 respectively to CO and CH 4 at the same gas concentration and operating temperature of 290 °C. The mechanism of TEOS action and gas sensing were also discussed.

原文???core.languages.en_GB???
文章編號6015524
頁(從 - 到)1234-1238
頁數5
期刊IEEE Sensors Journal
12
發行號5
DOIs
出版狀態已出版 - 2012

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