Abstract
WO3·H2O nanoplates were prepared by the acidification of Na2WO4· 2H2O and converted into monoclinic WO3 nanoplates by heat treatment. The sizes, morphologies and preferred orientation of the WO3 nanoplates could be controlled by manipulating the acidity of the solution used for the acidification reaction. All of the WO3 nanoplates showed the selective detection of NO2 in the presence of other reducing gases, such as C2H5OH, CH3COCH3, CO, C 3H8, and H2. The gas response, selectivity, and response speed were optimized by varying the morphology of the sensing materials and operation temperature. The WO3 nanoplates with a mean edge size of 192 nm showed the most rapid gas response along with a high response and selectivity to NO2 when operated at 300 °C.
| Original language | English |
|---|---|
| Pages (from-to) | 2020-2024 |
| Number of pages | 5 |
| Journal | Thin Solid Films |
| Volume | 519 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2011 Jan 3 |
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Keywords
- Gas sensor
- Nanostructures
- Powders
- Scanning electron microscopy
- Selective detection
- Tungsten oxide
- X-ray diffraction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Metals and Alloys
- Surfaces, Coatings and Films
- Surfaces and Interfaces
Cite this
Gas sensing characteristics of WO3 nanoplates prepared by acidification method. / Kim, Sun Jung; Hwang, In Sung; Choi, Joong Ki; Lee, Jong Heun.
In: Thin Solid Films, Vol. 519, No. 6, 03.01.2011, p. 2020-2024.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gas sensing characteristics of WO3 nanoplates prepared by acidification method
AU - Kim, Sun Jung
AU - Hwang, In Sung
AU - Choi, Joong Ki
AU - Lee, Jong Heun
PY - 2011/1/3
Y1 - 2011/1/3
N2 - WO3·H2O nanoplates were prepared by the acidification of Na2WO4· 2H2O and converted into monoclinic WO3 nanoplates by heat treatment. The sizes, morphologies and preferred orientation of the WO3 nanoplates could be controlled by manipulating the acidity of the solution used for the acidification reaction. All of the WO3 nanoplates showed the selective detection of NO2 in the presence of other reducing gases, such as C2H5OH, CH3COCH3, CO, C 3H8, and H2. The gas response, selectivity, and response speed were optimized by varying the morphology of the sensing materials and operation temperature. The WO3 nanoplates with a mean edge size of 192 nm showed the most rapid gas response along with a high response and selectivity to NO2 when operated at 300 °C.
AB - WO3·H2O nanoplates were prepared by the acidification of Na2WO4· 2H2O and converted into monoclinic WO3 nanoplates by heat treatment. The sizes, morphologies and preferred orientation of the WO3 nanoplates could be controlled by manipulating the acidity of the solution used for the acidification reaction. All of the WO3 nanoplates showed the selective detection of NO2 in the presence of other reducing gases, such as C2H5OH, CH3COCH3, CO, C 3H8, and H2. The gas response, selectivity, and response speed were optimized by varying the morphology of the sensing materials and operation temperature. The WO3 nanoplates with a mean edge size of 192 nm showed the most rapid gas response along with a high response and selectivity to NO2 when operated at 300 °C.
KW - Gas sensor
KW - Nanostructures
KW - Powders
KW - Scanning electron microscopy
KW - Selective detection
KW - Tungsten oxide
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=78651228580&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78651228580&partnerID=8YFLogxK
U2 - 10.1016/j.tsf.2010.10.026
DO - 10.1016/j.tsf.2010.10.026
M3 - Article
AN - SCOPUS:78651228580
VL - 519
SP - 2020
EP - 2024
JO - Thin Solid Films
JF - Thin Solid Films
SN - 0040-6090
IS - 6
ER -