Carbon Dioxide Sensor Based on PVA□/□Polyaniline-Based Composite Polymer Films

摘要

Carbon dioxide is an important gas in many industrial and biological processes, so numerous CO2 sensors have been developed for emissions monitoring and process control. The two most common approaches to CO2 detection are sensors based on electrochemical cells or sensors using Surface Acoustic Wave (SAW) devices. Electrochemical sensors for low temperatures are generally liquid-based, while solid electrolytes can be used in high-temperature sensors. SAW-based sensors use the measurement of mass changes associated with the interaction between CO2 and a CO2-absorbent layer. However, a recent report describes the use of a conducting polymer for development of a solid-state CO2 sensor.