Mixed-Potential-Type Gas Sensors Based on Pt/YSZ Film/LaFeO3 for Detecting NO2
Mixed-Potential-Type Gas Sensors Based on Pt/YSZ Film/LaFeO3 for Detecting NO2
复制标题
基于Pt/YSZ薄膜/LaFeO3的混合电位型NO2气体传感器
DOI：
10.1007/s11664-017-5738-8
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发表时间：
2017-12-01
影响因子：
2.1
通讯作者：
Zheng, Xuejun
中科院分区：
文献类型：
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作者：
Duan, Zaihua;Zhang, Yong;Zheng, Xuejun
采用柠檬酸盐溶胶-凝胶法合成了LaFeO 3纳米粒子，并通过X射线衍射、场发射扫描电子显微镜和X射线光电子能谱对其进行了表征。以LaFeO 3纳米粒子为敏感电极，8 mol.%以Y2 O3稳定的ZrO 2（YSZ）薄膜为电解质，铂（Pt）为参比电极。通过将气敏元件暴露于不同工作温度和NO2浓度的测试室中，研究了气敏元件的气敏特性。结果表明，在300 A ℃时，对100 ppm NO2的最大响应值为164 mV，对100 ppm NO2的响应时间和恢复时间分别为73 s和94 s。该气敏元件在50-400 ppm NO2浓度范围内具有良好的线性响应，斜率系数可达353 mV/decade。我们期望YSZ薄膜电解质可以用来制作高性能的混合电位型NO2气体传感器。
LaFeO3 nanoparticles were synthesized by a citrate sol-gel method and characterized by x-ray diffraction, field-emission scanning electron microscopy and x-ray photoelectron spectroscopy. A mixed-potential-type gas sensor was fabricated using LaFeO3 nanoparticles as sensing electrode, 8 mol.% Y2O3-stabilized ZrO2 (YSZ) film as electrolyte and platinum (Pt) as reference electrode. The gas-sensing properties of the gas sensor were investigated by exposing the gas sensor to the test chamber at different operating temperatures and NO2 concentrations. The results showed that the maximum response value was 164 mV to 100 ppm NO2 at 300A degrees C, and the response and recovery times were about 73 s and 94 s to 100 ppm NO2. The gas sensor exhibited a nearly linear response at 50-400 ppm NO2, and the slope coefficient reached up to 353 mV/decade. We expect that YSZ film electrolyte can be used to fabricate high-performance mixed-potential-type gas sensors for detecting NO2.