基于特殊形貌NiO电极的混合电位型C_3H_6传感器研究

Study of mixed-potential-type C_3H_6 sensors based on NiO electrode with special morphology

研究了特殊形貌Ni O对基于该类敏感电极的混合电位C3H6传感器的影响,实验数据显示：线型结构Ni O敏感电极传感器在600℃下具有最好的响应值,达到了60 m V,其90%的响应和恢复分别为15,25 s。此传感器在600℃对0%~0.05%C3H6具有较好敏感性能,且响应信号与气体体积分数对数之间有良好的线性关系,其灵敏度达-50.26 m V/decade。经气相催化分析,在400~600℃和0.01%C3H6下,线型形貌Ni O电极的平均气相催化效率最低,为31.4%（其余两种分别为42.7%,52.4%）,进而表现最优的传感器性能。

Effect of NiO sensing electrodes with special morphology on mixed-potential-based C3H6 sensors is researched, experimental datas show that the best response value that NiO sensitive electrode with line-like morphology sensing reaches 60 mV ,90 % response and recovery time of the sensor are 15 ,25 s . The sensor shows good sensitivity to 0 % -0.05 % C3 H6 and the response signal has good linear relationship with logarithm of C3 H6 volume fraction at 600 ℃, and sensitivity reach up to -50.26 mY/decade. By analysis of vapor phase catalytic, at 400 - 600℃ and 0.01% C3 H6 , average vapor phase catalytic efficiency of line-like NiO electrode is 31.4 % （ the others are 42.7 % ,52.4 % ） ,thereby presenting the optimal sensor performance.