期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 135, 期 2, 页码 610-617出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.09.026
关键词
SnO2 hollow sphere; Sensor; NO2; Response; Selectivity
资金
- Science and Technology Commission Foundation of Tianjin [08JCYBJC00100]
- 973 program of China [2005CB623607]
- National Natural Science Foundation of China [20771061, 20871071]
This work examined the possibility of using SnO2 hollow spheres mediated by carbon microspheres for the efficient detection of NO2 gas. The influences of gas concentration. operating temperature. crystallite (grain) size and structure feature on the sensing performance of the sensors based on SnO2 hollow spheres were comprehensively studied. The SnO2 hollow spheres had a mean crystallite size of 12.7, 14.1 and 22.8 nm when calcined at 450, 500 and 550 degrees C, respectively. It was found that the SnO2 hollow spheres calcined at 450 degrees C with a crystallite size of 12.7 nm were the most sensitive to NO2 gas. The sensor also had a better selectivity to NO2 than to ethanol, methanol, gasoline, acetone, CCl4 and NH3 when operated at 160 degrees C. (c) 2008 Elsevier B.V. All rights reserved.
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