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Selective Detection of NO2 Using Cr-Doped CuO Nanorods.
- Source :
-
Sensors (14248220) . 2012, Vol. 12 Issue 6, p8013-8025. 13p. - Publication Year :
- 2012
-
Abstract
- CuO nanosheets, Cr-doped CuO nanosheets, and Cr-doped CuO nanorods were prepared by heating a slurry containing Cu-hydroxide/Cr-hydroxide. Their responses to 100 ppm NO2, C2H5OH, NH3, trimethylamine, C3H8, and CO were measured. For 2.2 at% Cr-doped CuO nanorods, the response (Ra/Rg, Ra: resistance in air, Rg: resistance in gas) to 100 ppm NO2 was 134.2 at 250 °C, which was significantly higher than that of pure CuO nano-sheets (Ra/Rg = 7.5) and 0.76 at% Cr-doped CuO nanosheets (Ra/Rg = 19.9). In addition, the sensitivity for NO2 was also markedly enhanced by Cr doping. Highly sensitive and selective detection of NO2 in 2.2 at% Cr-doped CuO nanorods is explained in relation to Cr-doping induced changes in donor density, morphology, and catalytic effects. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITROGEN oxides
*COPPER oxide
*NANORODS
*NANOSTRUCTURES
*GAS detectors
*CATALYSIS
Subjects
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 12
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Sensors (14248220)
- Publication Type :
- Academic Journal
- Accession number :
- 84115844
- Full Text :
- https://doi.org/10.3390/s120608013