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다공성 Cr2O3 나노육각기둥을 이용한 C2H5OH 센서C2H5OH Sensor Using Porous Cr2O3 Nano-Hexaprisms
- Other Titles
- C2H5OH Sensor Using Porous Cr2O3 Nano-Hexaprisms
- Issue Date
- 2012
- Publisher
- 한국센서학회
- Keywords
- Cr2O3; C2H5OH; Gas sensors; Selectivity
- Citation
- 센서학회지, v.21, no.6, pp.451 - 455
- Indexed
- KCI
- Journal Title
- 센서학회지
- Volume
- 21
- Number
- 6
- Start Page
- 451
- End Page
- 455
- ISSN
- 1225-5475
- Abstract
- Dense Cr-precursor nano-hexaprisms were prepared by heating the Cr-nitrate aqueous solution containing Hexamethylenetetramine and polyvinylpyrrolidone, which were converted into porous Cr2O3 nano-hexaprisms containing nanoparticles by heat treatment of Crprecursors at 600 for 2 h in air atmosphere. At the sensor temperature of 300 , porous Cr2O3 nano-hexaprism showed the high response (Rg/Ra, Rg: resistance in gas, Ra: resistance in air) to 100 ppm C2H5OH (Rg/Ra=69.8) with negligible cross-responses to 100 ppm CO and 5 ppm C6H6. The sensitive and selective detection of C2H5OH in porous Cr2O3 nano-hexaprism were discussed in relation to the morphology of nanostructures.
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