基于纳米NiO颗粒敏感电极的NO_2气敏特性研究  

Investigation on NO_2 Gas Sensing Properties Based on Nano NiO Electrode

作　　者：郝增川[1] 王岭[1] 戴磊[1] 崔广华[1] 李跃华[1] 杨越涛[1] 

机构地区：[1]河北联合大学,河北唐山063009

出　　处：《稀有金属材料与工程》2011年第S1期413-417,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50772030;50972038)

摘　　要：利用浸渍技术在YSZ多孔层中制备NiO纳米颗粒材料,并以其为敏感电极组成新型的电流型NO2传感器。采用X射线衍射仪、扫描电子显微镜表征了NO2传感器物相和形貌结构,应用IM6e型电化学工作站测试了其气敏性能。实验结果表明:NiO颗粒粒度约50nm,且分布均匀。在500~600℃时,传感器对NO2有良好的敏感性,其响应电流值与NO2的浓度之间呈良好的线性关系。传感器对NO2响应时间短且响应信号稳定。O2和CO2的存在对传感器响应信号几乎没有影响。The nano-sized NiO sensing material was prepared by infiltration. A new type of amperometric NO2 sensor was fabricated using yttria-stabilized zirconia (YSZ) as electrolyte and NiO nanoparticles as sensing electrode. The phase composition and morphology of NO2 sensor were investigated by XRD and SEM, respectively. NO2 sensing properties of the sensor were investigated by IM6e electrochemical workstation. The results indicate that the diameter of NiO grains is around 50 nm. The sensor shows preferential sensitivity to NO2. The response current value at -300 mV of the present device is found to vary almost linearly with NO2 concentration from 50 to 500 μg/g at 500-600 °C. The sensor response to NO2 is quick and the response signal is stable. The sensor is hardly affected by co-existenting O2 of and CO2.

关 键 词：浸渍技术 电流型NO2传感器 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]