High-temperature NO2 gas sensor based on stabilized zirconia and CoTa2O6 sensing electrode
High-temperature NO2 gas sensor based on stabilized zirconia and CoTa2O6 sensing electrode
复制标题
基于稳定氧化锆和CoTa2O6传感电极的高温NO2气体传感器
DOI：
10.1016/j.snb.2016.08.134
复制
发表时间：
2017-03-01
影响因子：
8.4
通讯作者：
Lu, Geyu
中科院分区：
文献类型：
--
作者：
Liu, Fangmeng;Wang, Bin;Lu, Geyu
A mixed-potential type NO2 sensor based on stabilized-zirconia (YSZ) solid electrolyte and novel trirutile CoTa2O6 sensing electrode (SE) prepared through the sol-gel method was developed at high temperature. The effect of CoTa2O6 sensing electrode material calcinated at different temperatures on NO2 sensing property was mainly investigated and the device attached with CoTa2O6 -SE sintered at 1000 degrees C gave the highest response of 93 mV to 100 ppm NO2 and fast response and recovery times at 650 degrees C. The response of the sensor utilizing CoTa2O6-SE annealed at 1000 degrees C displayed segmentally linear relationship to the logarithm of NO2 concentration in the ranges of 0.5-5 ppm and 5-500 ppm, which the sensitivities were 12 and 80 mV/decade, respectively. Meanwhile, the present fabricated device also showed good reproducibility, selectivity, long-term stability and slight effect of oxygen and moisture at 650 degrees C. Furthermore, the mixed potential sensing mechanism proposed was discussed quantitatively and further verified by polarization curve measurement. (C) 2016 Elsevier B.V. All rights reserved.
