| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7149054 | Sensors and Actuators B: Chemical | 2013 | 7 Pages |
Abstract
The gas-sensing performance of SnO2 porous nanosolid (PNS) sensors was modulated via a surface modification strategy by calcining the sensors in different atmospheres. It was found that the response of SnO2 PNS sensors greatly improved (the maximum sensor response to 1000Â ppm CO is 45.6) after being calcined in atmospheric-pressure nitrogen. However, the sensor response firstly decreased to a large extent after being calcined in 0.1-10Â MPa oxygen, reaching a minimum value of â¼5.1 at 4.0Â MPa and followed by a slight increase with the oxygen pressure further increasing. Contrarily, the SnO2 PNS sensors exhibited monotonically deteriorating gas-sensing performance after being calcined in nitrogen of ever-increasing pressure. The mechanism related to the above phenomena was preliminarily explained by using the corresponding Hall effect and XPS measurement results.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Chunhong Luan, Kang Wang, Qinqin Yu, Gang Lian, Liangmin Zhang, Qilong Wang, Deliang Cui,