Hazardous gases sensors based on conducting polymer composites: Review

This article reviews application of conducting polymers and their composites as promising candidates for detection of the most environmentally hazardous gases, including NH3, NO2, H2S, and CO. The gases properties, harmfulness, and permissible Exposure Limit (PEL) of environmentally hazardous gases have been comprehensively elaborated. Promising materials for selective and sensitive detection of environmentally harmful gases have been reviewed in the present communication. For example, polyaniline composites are the supreme promising materials for NH3 and CO detecting while Polypyrrole, Poly (3,4-thylenedioxythiophene), and polythiophene sensors are the utmost active for NO2 and H2S monitoring, respectively. The gas sensing mechanism of differently prepared conducting polymers and its composites towards hazardous gases (viz. NH3, NO2, H2S, and CO) has also been comprehensively reviewed.

Automated summary

This article reviews the application of conducting polymers and their composites for detecting environmentally hazardous gases such as NH3, NO2, H2S, and CO. It comprehensively elaborates on the properties, harmfulness, and permissible exposure limits of these gases. Promising materials for selective and sensitive detection of environmentally harmful gases are discussed, along with the gas sensing mechanism of differently prepared conducting polymers and composites towards hazardous gases.