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The perovskite-structure CdSnO3 was obtained by calcinating CdSnO3·3H2O precursor at 550 ℃, which was synthesized by hydrothermal process at 170 ℃ for 16 h. The phase and microstructure of the obtained CdSnO3 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The CdSnO3 powders exhibit uniformly cubic structure with side length of about 100 nm. The effects of working temperature and concentration of detected gas on the gas response were studied. The selectivity of chlorine gas against other gases and response–recovery time of the sensor were also investigated. The results reveal that the CdSnO3 gas sensor has enhanced sensing properties to 1–10 ppm chlorine gas at room temperature; the value of gas response can reach 1338.9 to 5 ppm chlorine gas. Moreover, the sensor shows good selectivity and quick response behavior (23 s) to chlorine gas, indicating its application in detecting chlorine gas at room temperature in the future.


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Room-temperature chlorine gas sensor based on CdSnO3 synthesized by hydrothermal process

Show Author's information Xiaohua ZHAOZhenzhen LIXiangdong LOU*( )Meng LINing ZHANG
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China

Abstract

The perovskite-structure CdSnO3 was obtained by calcinating CdSnO3·3H2O precursor at 550 ℃, which was synthesized by hydrothermal process at 170 ℃ for 16 h. The phase and microstructure of the obtained CdSnO3 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The CdSnO3 powders exhibit uniformly cubic structure with side length of about 100 nm. The effects of working temperature and concentration of detected gas on the gas response were studied. The selectivity of chlorine gas against other gases and response–recovery time of the sensor were also investigated. The results reveal that the CdSnO3 gas sensor has enhanced sensing properties to 1–10 ppm chlorine gas at room temperature; the value of gas response can reach 1338.9 to 5 ppm chlorine gas. Moreover, the sensor shows good selectivity and quick response behavior (23 s) to chlorine gas, indicating its application in detecting chlorine gas at room temperature in the future.

Keywords:

chlorine gas sensor, room temperature, CdSnO3, hydrothermal process
Received: 31 October 2012 Revised: 29 December 2012 Accepted: 31 December 2012 Published: 06 April 2013 Issue date: March 2013
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Publication history
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Publication history

Received: 31 October 2012
Revised: 29 December 2012
Accepted: 31 December 2012
Published: 06 April 2013
Issue date: March 2013

Copyright

© The author(s) 2013

Acknowledgements

This project is supported by the Natural Science Foundation of Henan Provincial Education Department, China (Grant Nos. 2008B43001 and 2010B150017).

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