Gas Sensing Properties of Quantum-Sized ZnO Nanoparticles for NO2

被引：13
|
作者：
Bai, Shouli [1 ]
Hu, Jingwei [1 ]
Xu, Xiaoyan [1 ]
Luo, Ruixian [1 ]
Li, Dianqing [1 ]
Chen, Aifan [1 ]
Liu, Chung Chiun [2 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
[2] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA
来源：
IEEE SENSORS JOURNAL | 2012年 / 12卷 / 05期
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
NO2; quantum size; sensors; ZnO;
D O I：
10.1109/JSEN.2011.2167507
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
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 degrees C for 1 h. The ZnO sensor exhibited the highest response of 264 to 40 ppm NO2 and the highest selectivity of 8.8 and 13.7 respectively to CO and CH4 at the same gas concentration and operating temperature of 290 degrees C. The mechanism of TEOS action and gas sensing were also discussed.
引用
收藏
页码：1234 / 1238
页数：5
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