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 |
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Pages (from-to) | 9029-9038 |
Number of pages | 10 |
Journal | Sensors |
Volume | 9 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2009 Nov |
Externally published | Yes |
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