Selective detection of formaldehyde gas using a Cd-Doped TiO2-SnO2 sensor

Wen Zeng; Tianmo Liu; Zhongchang Wang; Susumu Tsukimoto; Mitsuhiro Saito; Yuichi Ikuhara

doi:10.3390/s91109029

Selective detection of formaldehyde gas using a Cd-Doped TiO₂-SnO₂ sensor

Wen Zeng, Tianmo Liu, Zhongchang Wang, Susumu Tsukimoto, Mitsuhiro Saito, Yuichi Ikuhara

Research output: Contribution to journal › Article › peer-review

121 Citations (Scopus)

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.

Original language	English
Pages (from-to)	9029-9038
Number of pages	10
Journal	Sensors
Volume	9
Issue number	11
DOIs	https://doi.org/10.3390/s91109029
Publication status	Published - 2009 Nov

Keywords

Cd doping
Formaldehyde
Gas sensor
TiO-SnO
Volatile organic compound

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Electrical and Electronic Engineering

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AU - Saito, Mitsuhiro

AU - Ikuhara, Yuichi

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