Affiliation:
1. University of the Punjab, Lahore, Pakistan
2. University of Education, Lahore, Pakistan
3. University of Engineering and Technology, Lahore, Pakistan
Abstract
Air contamination and a growing number of harmful gases releasing into the environment is a big issue of present era. Gases like CO, NH3, CO2, SO2, and CH4 can prompt lethal health threats. Gas sensors have attained noteworthy consideration of researchers in monitoring such kind of pollutants. Detection of gases by sensors typically depends upon the sensing properties, like sensitivity, selectivity, response, and recovery time. With the progress of the internet-of-things technology, the uses of gas sensors in the fields of smart homes, wearable gadgets, and smart mobile terminals have developed rapidly. In this chapter, various groups of the sensing materials are outlined thoroughly, comprising gas sensors based on multifunctional materials such as: metals, graphene, cellulose, MXenes, acoustic wave sensors, and catalytic sensors. This chapter also outlines the current accomplishments in the field of gas detection and signifies the current challenges and future outlooks in this field.