pp. 649-663
S&M1031 Research Paper https://doi.org/10.18494/SAM.2014.931 Published: November 18, 2014 Gas Sensing Properties and In Situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy Study of Acetone Adsorption and Reactions on SnO2 Films [PDF] Zhenxin Zhang, Kaijin Huang, Fangli Yuan and Changsheng Xie (Received July 26, 2013; Accepted February 10, 2014) Keywords: flat-type coplanar gas sensor arrays, acetone, SnO2 films, in situ DRIFTS
SnO2 flat-type coplanar gas sensor arrays were fabricated by a screen-printing technique based on SnO2 nanopowders prepared by a sol-gel method. The SnO2 flat-type coplanar gas sensor arrays had good acetone gas-sensing characteristics such as a fast response, short recovery time, and an almost linear response to acetone concentration of 1−100 ppm. The response could reach 2.11 for acetone concentration as low as 1 ppm, and the response and recovery times for 1 ppm acetone were 8.9 and 10 s, respectively. The surface reactions were investigated by in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) at different temperatures, and a possible sensing mechanism was proposed. Formate, acetate, carbonate ions, CH3O(ads), CO2, H2O, and adsorbed acetone were detected when the SnO2 flims were exposed to 100 ppm acetone at different temperatures.
Corresponding author: Kaijin HuangCite this article Zhenxin Zhang, Kaijin Huang, Fangli Yuan and Changsheng Xie, Gas Sensing Properties and In Situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy Study of Acetone Adsorption and Reactions on SnO2 Films, Sens. Mater., Vol. 26, No. 9, 2014, p. 649-663. |