Sensors 2009, 9(11), 9029-9038; doi:10.3390/s91109029
Article

Selective Detection of Formaldehyde Gas Using a Cd-Doped TiO2-SnO2 Sensor

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Received: 9 October 2009; in revised form: 28 October 2009 / Accepted: 29 October 2009 / Published: 13 November 2009
(This article belongs to the Special Issue Gas Sensors 2009)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: We report the microstructure and gas-sensing properties of a nonequilibrium TiO2-SnO2 solid solution prepared by the sol-gel method. In particular, we focus on the effect of Cd doping on the sensing behavior of the TiO2-SnO2 sensor. Of all volatile organic compound gases examined, the sensor with Cd doping exhibits exclusive selectivity as well as high sensitivity to formaldehyde, a main harmful indoor gas. The key gas-sensing quantities, maximum sensitivity, optimal working temperature, and response and recovery time, are found to meet the basic industrial needs. This makes the Cd-doped TiO2-SnO2 composite a promising sensor material for detecting the formaldehyde gas.
Keywords: volatile organic compound; formaldehyde; TiO2-SnO2; Cd doping; gas sensor
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MDPI and ACS Style

Zeng, W.; Liu, T.; Wang, Z.; Tsukimoto, S.; Saito, M.; Ikuhara, Y. Selective Detection of Formaldehyde Gas Using a Cd-Doped TiO2-SnO2 Sensor. Sensors 2009, 9, 9029-9038.

AMA Style

Zeng W, Liu T, Wang Z, Tsukimoto S, Saito M, Ikuhara Y. Selective Detection of Formaldehyde Gas Using a Cd-Doped TiO2-SnO2 Sensor. Sensors. 2009; 9(11):9029-9038.

Chicago/Turabian Style

Zeng, Wen; Liu, Tianmo; Wang, Zhongchang; Tsukimoto, Susumu; Saito, Mitsuhiro; Ikuhara, Yuichi. 2009. "Selective Detection of Formaldehyde Gas Using a Cd-Doped TiO2-SnO2 Sensor." Sensors 9, no. 11: 9029-9038.


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