Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7744448 | Solid State Ionics | 2018 | 7 Pages |
Abstract
The CeO2-based mixed potential type gas sensors attached with MMnO3 (M: Sr, Ca, La and Sm) sensing electrode have been fabricated to detect acetone. All MMnO3 materials were prepared by a simple sol-gel method. The results indicated that the response of the sensor based on SrMnO3 sintered at 1000â¯Â°C to 20â¯ppm acetone was the highest compared with sensors using MMnO3 (M: Ca, La and Sm)-SE, which was â49â¯mV. The sensor attached with SrMnO3-SE could detect even 1â¯ppm acetone, and the response value (ÎV) was â3â¯mV, which was an acceptable value. The ÎV of the sensor was linearly changed with the logarithm of acetone concentration in the range of 1-50â¯ppm and the sensitivity was â36â¯mV/decade. Most notably, the typical 90% response and recovery times of the sensor attached with SrMnO3-SE to 20â¯ppm acetone were only 2â¯s and 6â¯s. Moreover, the sensor manifested good repeatability and stability. Besides, the sensing mechanism of the sensor was explained, and polarization curve was measured to further demonstrate the mixed potential mechanism.
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Authors
Tong Liu, Xue Yang, Ce Ma, Xidong Hao, Xishuang Liang, Fangmeng Liu, Fengmin Liu, Chunhua Yang, Hongqiu Zhu, Geyu Lu,