title: Selective Detection of Formaldehyde Gas Using a Cd-Doped TiO(2)-SnO(2) Sensor.
abstract: We report the microstructure and gas-sensing properties of a nonequilibrium TiO(2)-SnO(2) solid solution prepared by the sol-gel method. In particular, we focus on the effect of Cd doping on the sensing behavior of the TiO(2)-SnO(2) 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 TiO(2)-SnO(2) composite a promising sensor material for detecting the formaldehyde gas.
authors.affiliation: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P. R. China; E-Mail:  zeng_wen1982@yahoo.com.cn.
authors.forename: Wen
authors.initials: W
authors.lastname: Zeng
authors.forename: Tianmo
authors.initials: T
authors.lastname: Liu
authors.forename: Zhongchang
authors.initials: Z
authors.lastname: Wang
authors.forename: Susumu
authors.initials: S
authors.lastname: Tsukimoto
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Saito
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Ikuhara