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.
| Original language | English |
|---|---|
| Pages (from-to) | 8013-8025 |
| Number of pages | 13 |
| Journal | Sensors (Switzerland) |
| Volume | 12 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2012 Jun 1 |
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Keywords
- CrO
- CuO
- Gas sensor
- Nanorods
- Nanosheets
- Nanostructures
- P-type
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
- Analytical Chemistry
- Biochemistry
Cite this
Selective Detection of NO2 Using Cr-Doped CuO Nanorods. / Kim, Kang Min; Jeong, Hyun Mook; Kim, Hae Ryong; Choi, Kwon Il; Kim, Hyo Joong; Lee, Jong Heun.
In: Sensors (Switzerland), Vol. 12, No. 6, 01.06.2012, p. 8013-8025.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Selective Detection of NO2 Using Cr-Doped CuO Nanorods
AU - Kim, Kang Min
AU - Jeong, Hyun Mook
AU - Kim, Hae Ryong
AU - Choi, Kwon Il
AU - Kim, Hyo Joong
AU - Lee, Jong Heun
PY - 2012/6/1
Y1 - 2012/6/1
N2 - 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.
AB - 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.
KW - CrO
KW - CuO
KW - Gas sensor
KW - Nanorods
KW - Nanosheets
KW - Nanostructures
KW - P-type
UR - http://www.scopus.com/inward/record.url?scp=84863207937&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863207937&partnerID=8YFLogxK
U2 - 10.3390/s120608013
DO - 10.3390/s120608013
M3 - Article
C2 - 22969384
AN - SCOPUS:84863207937
VL - 12
SP - 8013
EP - 8025
JO - Sensors (Switzerland)
JF - Sensors (Switzerland)
SN - 1424-8220
IS - 6
ER -