基于YSZ的钨酸铁氢气传感器气敏特性研究

Research on the sensing performance of YSZ-based FeWO_4 hydrogen sensor

采用水热法合成了钨酸铁纳米材料,应用XRD和SEM对钨酸铁纳米材料进行了表征和分析,研制了一种基于YSZ的混合电位型FeWO_4/YSZ/Pt氢气传感器.在500℃时,氧气浓度为10%条件下,基于YSZ的钨酸铁传感器对浓度80~960 ppm的H_2有着良好的气敏性能,并对CO,C_3H_8,NO_2这些可能的干扰气体有着优异的选择性,传感器同时具有良好的重复性和一致性.与已有的MnWO_4/YSZ/Pt和CdWO_4/YSZ/Pt氢气传感器对比发现FeWO4/YSZ/Pt氢气传感器性能更佳.

FeWO4 nano-materials was synthesized by hydrothermal method. XRD and SEM were used to characterize and analyze the FeWO4 nano-materials, and a kind of YSZ-based mixed potential type FeWO4/YSZ/Pt hydrogen sensor was developed. The FeWO4/YSZ/Pt sensor indicated a good sensitivity performance to hydrogen in a concentration range of 80–960 ppm and excellent selectivity to some possible interferences such as CO, C3H8 and NO2 at 500°C in a background of 10 vol% oxygen balanced with nitrogen. The sensor also have favorable repeatability and sensor to sensor consistency. Compared with existing MnWO4/YSZ/Pt and CdWO4/YSZ/Pt hydrogen sensor, the sensing performance of FeWO4/YSZ/Pt hydrogen sensor was better.