Optical and Electrochemical Chemosensors for Identification of Carbon Dioxide Gas

Abstract

Intelligent sensing and vigilant monitoring of CO2 gas is immensely significant, as the concentration of CO2 gas in atmosphere is increasing day by day due to anthropogenic activities which enhances the natural greenhouse effect and makes the earth warmer. Besides global warming, CO2 is also a toxicant in enclosed environments causing asphyxiation by hypoxia, unconsciousness almost instantaneously, and respiratory arrest within one minute. Another area where sensing of CO2 is imperative are agriculture and food industry. For these conditions, sensors should be capable of working under extreme temperatures, pressure, and interference due to the inherent complex materials and microorganisms. This chapter focuses on the information regarding the different types of CO2 sensors available with special emphasis on electrochemical sensors and optical chemical sensors, which showed fluorescent and spectrophotometric variation on detection of CO2, a detailed analysis of their detection process and sensing mechanism.