4.7 Article

LaNiTiO3-SE-based stabilized zirconium oxide mixed potentiometric SO2 gas sensor

期刊

CERAMICS INTERNATIONAL
卷 48, 期 7, 页码 9269-9276

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.12.113

关键词

SO2 sensor; Mixed-potential; LaNiTiO3; Yttria-stabilized zirconia

资金

  1. National Nature Science Foundation of China [61803172]
  2. Hainan Provincial Natural Science Foundation of China [621RC509]
  3. Start-up Research Foundation of Hainan University [KYQD (ZR) 1910]
  4. [(ZR) 1910]

向作者/读者索取更多资源

In this study, a mixed potential gas sensor based on YSZ solid electrolyte and LaNiTiO3 sensing electrode was developed. The sensor exhibited high sensitivity to low-level concentration of SO2, and demonstrated good selectivity, repeatability, and stability.
In this paper, a mixed potential gas sensor based on YSZ solid electrolyte and LaNiTiO3 sensing electrode was produced. The perovskite-type oxide LaNiTiO3 was synthesized by the sol-gel method as a sensitive electrode, which was intended to detect the low-level concentration of SO2 in the environment. After the aging process and continuous testing, it was found that the LaNiTiO3-SE sensor had the best response value of-27.5 mV to 5 ppm SO2 at 510 & DEG;C, at this temperature, as low as 50 ppb SO2 still had a response of-1mV. Meanwhile, when the sensor was tested at 510 & DEG;C, it was found that the response value of the sensor showed a piecewise linear relationship with the logarithm of SO2 concentration, with a sensitivity of-4 mV/decade for 0.05-1 ppm SO2 and-40mV/decade for 1-100 ppm SO2. In addition, the sensor also showed good selectivity, and the response to interference gases could be ignored such as NO2, CO, CH4, NH3, H-2, ethanol, and formaldehyde. At the same time, the sensor also shows good repeatability and stability, being still relatively stable after two weeks of continuous operation at high-temperature.

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