Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7138930 | Sensors and Actuators B: Chemical | 2018 | 8 Pages |
Abstract
An ultrafast-response yttria stabilized zirconia (YSZ)-based mixed potential type gas sensor utilizing molybdate CoMoO4 sensing electrode was developed to realize the effective detection of triethylamine (TEA) at 600â¯Â°C. The gas sensing characteristic of the fabricated sensor was optimized by changing the calcination temperature of CoMoO4 sensing material and results indicated that the device attached with CoMoO4-SE sintered at 1000â¯Â°C exhibited the highest response value (â102â¯mV) to 100â¯ppm TEA and low detection limit of 100â¯ppb at 600â¯Â°C. Interestingly, the response and recovery times of the present sensor to 100â¯ppm TEA were 1â¯s and 10â¯s, which signified the ultra-fast response rate. The response value of fabricated sensor displayed the piecewise linear function to logarithm of TEA concentrations and the sensitivities were â14â¯mV/decade (0.1-5â¯ppm) and â53â¯mV/decade (5-200â¯ppm), respectively. More importantly, the present sensor also exhibited good repeatability, selectivity, slight effect of humidity and long-term stability of 20 days, indicating a great candidate for use in detection of TEA. Furthermore, the device based on mixed potential mechanism was proposed and further verified using polarization curve.
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Authors
Fangmeng Liu, Zijie Yang, Junming He, Rui You, Jing Wang, Siqi Li, Huiying Lu, Xishuang Liang, Peng Sun, Xu Yan, Xiaohong Chuai, Geyu Lu,