敏感电极结构对CO2传感器性能的影响  

Influence of Sensing Electrode Structure on Response of CO2 Sensor

作　　者：王光伟 陈鸿珍[2] 李友凤[1] 谢波 胡明华 WANG Guang-wei;CHEN Hong-zhen;LI You-feng;XIE Bo;HU Ming-hua(Department of Chemistry and Chemical Engineering,Zunyi Normal University,Zunyi 563006,China;Chongqing Instituteof Green and Intelligent Technology(CIGIT),Chinese Academy of Sciences,Chongqing 400714,China)

机构地区：[1]遵义师范学院化学化工学院,贵州遵义563006 [2]中国科学院重庆绿色智能技术研究院,重庆400714

出　　处：《仪表技术与传感器》2020年第3期1-5,37,共6页Instrument Technique and Sensor

基　　金：国家自然科学基金资助项目(41763008,41203047);贵州省科技支撑计划项目(黔科合支撑[2018]2774);贵州省普通高等学校科技拔尖人才支持计划项目(黔教合KY字[2017]086);遵义师范学院博士启动基金项目(遵师BS[2017]02);重庆市前沿与应用基础研究项目(cstc2015jcyjA20008)。

摘　　要：利用Li2CO3-锂钡掺杂氧化碳酸盐作为敏感电极材料,构建YSZ固体电解质CO2电化学传感器,并借助于扫描电镜、XRD、CO2响应测试,详细研究了敏感电极结构对传感器性能的影响。结果表明,将Li2CO3-锂钡掺杂氧化碳酸盐混合物直接涂覆于YSZ固体电解质表面所制作的传感器响应电动势平稳,性能最好。该传感器具有较低的氧含量依赖特性,在氧含量分别为20%(空气中)、10%、2%、0.2%时均具有较好的CO2响应;并且在待测体系中引入10%水蒸汽后,其响应性能也未受到明显影响。The CO2 sensor having Li2CO3-Li and Ba co-doped oxycarbonate as its sensitive electrode and YSZ as its electrolyte was designed,and the influence of sensing electrode structure on its characteristics was studied by the means of SEM,XRD and CO2 response detection.The results indicate that the potentiometric sensor with the mixture of Li2CO3 and oxycarbonate directly coating on the YSZ surface respond best.It exhibites correct and rapid response with different oxygen contents(air,10%,2%,0.2%),which evidences the relatively low oxygen dependency of the sensor.Moreover,after 10%water vapor is introduced into the system to be tested,its response performance is not significantly affected.

关 键 词：碳酸锂 氧化碳酸盐 敏感电极 YSZ CO2传感器 

分 类 号：TQ174.7[化学工程—陶瓷工业]