Selective gas detection of SnO2-TiO2 gas sensors
SCIE
SCOPUS
- Title
- Selective gas detection of SnO2-TiO2 gas sensors
- Authors
- Moon, WJ; Yu, JH; Choi, GM
- Date Issued
- 2004-07
- Publisher
- KLUWER ACADEMIC PUBL
- Abstract
- The composite, consisting of two materials with different sensing temperatures, may show the selectivity for a particular gas. In this study, the microstructural and compositional effects on the electrical conductivity and the CO and the H-2 gas sensing properties of SnO2-TiO2 composites were examined. SnO2-TiO2 composites in entire (0-100 mol%) composition range were fabricated in the form of porous pellet by sintering at 800degreesC for 3 h. The effects of CuO-coating (or doping) on the electrical conductivity and the sensing properties to 200 ppm CO and H-2 gases were examined. With CuO-coating, SnO2-TiO2 composites showed the increased sensitivity to CO gas and a large difference in the sensing temperatures between CO and H-2 gases. As a result, CuO-coated SnO2-TiO2 composites showed the selectivity for CO gas between 100degreesC and 190degreesC and the selectivity for H-2 gas between 280degreesC and 380degreesC.
- Keywords
- SnO2; TiO2; CuO; composite; sensitivity; selectivity; SENSING PROPERTIES; COMPOSITE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24831
- DOI
- 10.1007/s10832-004-5180-1
- ISSN
- 1385-3449
- Article Type
- Article
- Citation
- JOURNAL OF ELECTROCERAMICS, vol. 13, no. 1-3, page. 707 - 713, 2004-07
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