纳米结构CuO为敏感电极的阻抗谱型NO_2传感器  

Impedencemetric-Type NO_2 Sensor with CuO Nano-Structured Sensing Electrode

作　　者：王岭[1] 郝增川[1] 戴磊[1] 李跃华[1] 吴印林[1] 崔广华[1] 

机构地区：[1]河北联合大学化学工程学院,唐山063009

出　　处：《无机化学学报》2012年第1期81-87,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.50772030;50972038);河北省重点基础研究(No.09965119D)资助项目

摘　　要：以浸渍技术制备的纳米CuO颗粒作敏感电极,以YSZ作为固体电解质制备了阻抗谱型NO2传感器。采用XRD、SEM对NO2传感器敏感材料的相组成和微观形貌进行了表征,应用电化学工作站测试了传感器的敏感性能。结果表明:浸渍法制得的CuO颗粒均匀分布在电解质的多孔层内,粒径在200 nm左右。在450～550℃,传感器对NO2有良好的敏感性,在0.1 Hz总阻抗|Z|=(Z′2+Z″2)～(1/2)姨与NO2浓度(0～200 mL.m-3)呈良好的线性关系。传感器的固有响应时间为50 s,共存的O2和CO2气体对传感器敏感性能几乎没有影响。An impedancemetric NO2 sensor was fabricated with infiltrated nano-structured CuO as sensing electrode and YSZ as solid electrolyte. The phase composition and microstructure of sensing material of thesensor were characterized by XRD and SEM. NO2 sensing performance of the sensor was investigated by electrochemical measurement. The results indicate that the CuO particles uniformly distribute in porous YSZ layer and their sizes are around 200 nm. The sensor shows good response to NO2. The total impedance values[Z]=√Z^12Z^12of the device at 0.1Hz are found to vary almost linearly with the NO2 concentrations from 0 to 200 mL·m^-3 at 450-550 ℃. The response time of the sensor is about 50 s and sensing performance to NO2 of the device are hardly affected by co-existent O2 and CO2.

关 键 词：阻抗谱型NO2传感器 浸渍技术 CuO纳米颗粒 YSZ 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]