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Sensors 2019, 19(2), 233; https://doi.org/10.3390/s19020233

Semiconductor Metal Oxides as Chemoresistive Sensors for Detecting Volatile Organic Compounds

1,2,* , 1,2
,
1,2
,
1,2
and
1,2,*
1
College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China
2
Key Laboratory of Geophysics Exploration Equipment, Ministry of Education of China, Changchun 130061, China
*
Authors to whom correspondence should be addressed.
Received: 29 October 2018 / Revised: 20 December 2018 / Accepted: 2 January 2019 / Published: 9 January 2019
(This article belongs to the Special Issue Recent Advances in Gas Nanosensors)
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Abstract

Volatile organic compounds (VOCs), which originate from painting, oil refining and vehicle exhaust emissions, are hazardous gases that have significant effects on air quality and human health. The detection of VOCs is of special importance to environmental safety. Among the various detection methods, chemoresistive semiconductor metal oxide gas sensors are considered to be the most promising technique due to their easy production, low cost and good portability. Sensitivity is an important parameter of gas sensors and is greatly affected by the microstructure, defects, catalyst, heterojunction and humidity. By adjusting the aforementioned factors, the sensitivity of gas sensors can be improved further. In this review, attention will be focused on how to improve the sensitivity of chemoresistive gas sensors towards certain common VOCs with respect to the five factors mentioned above. View Full-Text
Keywords: volatile organic compounds; semiconductor; metal oxide; gas sensor; sensitivity volatile organic compounds; semiconductor; metal oxide; gas sensor; sensitivity
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Lin, T.; Lv, X.; Hu, Z.; Xu, A.; Feng, C. Semiconductor Metal Oxides as Chemoresistive Sensors for Detecting Volatile Organic Compounds. Sensors 2019, 19, 233.

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