STUDY ON THE SOLID-STATE ELECTROCHEMICAL SENSOR TECHNIQUES FOR THE DETECTION OF CO2 AND O2 GASES

Abstract

A new type of solid-state electrochemical sensor was studied in this paper. By mixing proper content of polyacrylonitrile (PAN)-Polyvinylpyrrolidone (PVP)-Dimethylsulfoxide (DMSO)-Tetraethylammonium perchlorate (TEAP), an elastic and porous polymeric solid electrolyte was developed. According to the microelectrode theory and modulated pulse potential technique, an electrochemical sensor that can realize the synchronous and fast detection of CO 2 and O 2 at room temperature was designed. Experimental data showed that this polymer electrolyte exhibited ionic conductivity of the order of 10-4 S/cm at room temperature, and also showed that the sensor had many advantages such as small volume, convenient usage and certain extent stability.