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Mixed potential type sensor based on Gd2Zr2O7 solid electrolyte and BiVO4 sensing electrode for effective detection of triethylamine
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2022-07-28 , DOI: 10.1016/j.jhazmat.2022.129695
Li Jiang 1 , Yong Liu 1 , Wei Sun 2 , Minghao Tang 1 , Yueying Zhang 1 , Siyuan Lv 1 , Jing Wang 3 , Yi Liu 2 , Chenguang Wang 4 , Peng Sun 4 , Jie Zheng 1 , Fangmeng Liu 4 , Geyu Lu 4
Affiliation  

Triethylamine (TEA), as a common and widely used industrial raw material, is extremely hazardous to the environment and human health. Therefore, the development of a portable gas-sensing technology for high-efficiency detection of TEA is of great worth for human health and environmental monitoring. In this work, a mixed potential type TEA sensor was initially developed based on pyrochlore Gd2Zr2O7 solid state electrolyte and BiVO4 sensing electrode. The sensor generates high response values of − 62.2 mV and − 134.4 mV to 5 ppm and 100 ppm TEA at 500 °C, respectively. The response value of the sensor displays a logarithmic linear relationship with the concentration of TEA in the range of 1–100 ppm with the sensitivity of − 50.8 mV/decade. Besides, the sensor shows good response and recovery characteristics, and the response and recovery time to 10 ppm TEA is 10 s and 89 s, respectively. Moreover, the sensor possesses good humidity resistance, reproducibility and stability. The sensing behavior of the sensor is explained by the mixed potential sensing mechanism, which is confirmed by the measurement of the polarization curves. This work provides a good supplement for TEA gas sensor, which holds important application value for the sensitive detection of TEA in the environment.



中文翻译:

基于Gd2Zr2O7固体电解质和BiVO4传感电极的混合电位型传感器有效检测三乙胺

三乙胺(TEA)作为一种常见且广泛使用的工业原料,对环境和人体健康危害极大。因此,开发一种高效检测TEA的便携式气敏技术对人类健康和环境监测具有重要价值。本工作初步开发了一种基于烧绿石Gd 2 Zr 2 O 7固态电解质和BiVO 4的混合电位型TEA传感器。感应电极。该传感器在 500 °C 下分别对 5 ppm 和 100 ppm TEA 产生 − 62.2 mV 和 − 134.4 mV 的高响应值。传感器的响应值在 1-100 ppm 范围内与 TEA 浓度呈对数线性关系,灵敏度为 - 50.8 mV/decade。此外,该传感器具有良好的响应和恢复特性,对 10 ppm TEA 的响应和恢复时间分别为 10 s 和 89 s。此外,该传感器具有良好的耐湿性、重现性和稳定性。混合电位传感机制解释了传感器的传感行为,并通过极化曲线的测量证实了这一点。该工作为TEA气体传感器提供了很好的补充,对环境中TEA的灵敏检测具有重要的应用价值。

更新日期:2022-07-28
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