Institute of Electrical and Electronics Engineers Inc.;IEEE
摘要:
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. 其他題名： JSEN 出版者： IEEE 出版日期： 2012-05 出處： IEEE sensors journal, 2012-05, Vol.12 (5), p.1234-1238 資源來源： IEEE Electronic Library (IEL) 識別號： ISSN: 1530-437X 識別號： EISSN: 1558-1748 識別號： DOI: 10.1109/JSEN.2011.2167507 識別號： CODEN: ISJEAZ
