期刊
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
卷 138, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2021.106246
关键词
VOCs; Pollution gas; Gas sensor; SnO2; Composites
类别
资金
- National Science Foundation of China [61904123]
- Natural Science Foundation of Tianjin [18JCQNJC71800]
- Scientific Research Project of Tianjin Educational Committee [2018KJ220]
- Tianjin Technical and Engineering Center of Nonwovens [KF202103]
This review introduces the sensing mechanism of tin dioxide (SnO2) sensors and various methods to improve the gas sensing performance, including changing morphology and structure, doping, dynamic response, and sensor arrays. Composite sensors can significantly enhance detection performance of toxic and harmful gases.
The uncontrolled emission of toxic and harmful gases will seriously restrict the sustainable development of social economy system and threaten people's health. Therefore, it is essential to detect and monitor them effectively and quickly. Metal oxide sensor is one of the most common sensors to detect these gases, with high stability, strong selectivity and other characteristics. Among them, tin dioxide (SnO2) based sensor has been widely used due to its semiconductor sensor characteristics. This review not only presents the sensing mechanism of SnO2 sensors, but also summarizes and reviews the various methodological used to improve the gas sensing performance of SnO2 based gas sensors, including changing the morphology and structure, doping, and dynamic response and sensor arrays. The composite sensor can significantly improve the sensing performance of the gas sensor against toxic and harmful gases. Finally, possible solutions are proposed for the existing difficulties of SnO2-based gas sensors.
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