The steadily increasing concentration of carbon dioxide (CO₂) gas in the atmosphere is a significant environmental problem in modern society. Henceforth, there is triggering interest in the new technological solutions for CO₂ monitoring. This work reports the fabrication of a novel, low cost, chemiresistive carbon dioxide sensor based on the PVA/[EMIM][SCN] based ionogel membrane. Here, the lightweight transparent ionogel membrane with enhanced ionic conductivity is acted as the electrically conductive region of the sensor. The response rate of the CO₂ sensor was monitored in terms of direct as well as alternating current resistance using a high-precision multimeter and an impedance spectroscopy, respectively. The CO₂ desorption kinetics were also studied to check the reliability of the sensor using the conductometric approach. The selectivity of the sensor for CO₂ gas was well evidently quantified by comparing the response rate of the sensor with both CO₂ and N₂ gases. The optical microscopic images were periodically taken before and after CO₂ exposure in conjunction with the conductivity data revealed the physisorption mechanism of the sensor. The upshots presented herein will promote the development of an organic CO₂ gas sensor, which will be worthwhile for numerous industrial and practical applications and for air quality control in the future.

大气中二氧化碳 (CO ₂ ) 气体的浓度不断增加是现代社会的一个重大环境问题。此后，人们对用于 CO ₂监测的新技术解决方案产生了兴趣。这项工作报告了基于 PVA/[EMIM][SCN] 离子凝胶膜的新型、低成本、化学电阻二氧化碳传感器的制造。在这里，具有增强离子电导率的轻质透明离子凝胶膜充当传感器的导电区域。CO ₂传感器的响应率分别使用高精度万用表和阻抗谱在直流电阻和交流电阻方面进行监测。二氧化碳₂还研究了解吸动力学，以使用电导方法检查传感器的可靠性。通过比较传感器与 CO ₂和 N ₂气体的响应速率，可以清楚地量化传感器对 CO ₂气体的选择性。在CO ₂暴露之前和之后定期拍摄光学显微图像，结合电导率数据揭示传感器的物理吸附机制。本文提出的结果将促进有机 CO ₂气体传感器的发展，这对于未来的众多工业和实际应用以及空气质量控制都是值得的。