University Chemistry ›› 2021, Vol. 36 ›› Issue (9): 2012045.doi: 10.3866/PKU.DXHX202012045

Special Issue: 分析化学课程与实验教学

• Survey of Chemistry • Previous Articles     Next Articles

Research and Application of Gas Sensors: The Core of Electronic Nose

Xiaozheng Xie1, Yan Xia1,2,*()   

  1. 1 Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Center for Analytical Science, College of Chemistry, Nankai University, Tianjin 300071, China
    2 Central Laboratory of Nankai University, Tianjin 300071, China
  • Received:2020-12-28 Accepted:2021-01-21 Published:2021-01-29
  • Contact: Yan Xia


The electronic nose is a high-tech product developed to simulate the olfactory organs of animals. As the core component of the electronic nose, the gas sensor converts information such as composition and concentration into electrical signal by reacting with the gas to be measured. The sensors can realize the fast, sensitive and real-time detection of harmful gases in the environment. This article introduces the basic principles and application fields of semiconductor, electrochemical, and infrared gas sensors, focusing on the research progress of gas sensors in recent years, and prospects for their future development.

Key words: Gas sensing, Semiconductor sensor, Electrochemical sensor, Infrared gas sensor


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