Abstract
Tungsten-coated carbon microspheres were prepared by one-pot hydrothermal reaction of an aqueous solution containing glucose and sodium tungstate. The spheres were converted into WO3 hollow microspheres by the decomposition of their core carbon. The [glucose]/[sodium tungstate] ratio of the stock solution determined not only the morphology of the precursors but also the phase of the powders after calcination. The WO3 hollow microspheres showed a higher gas response and more selective detection of 0.5-2.5 ppm NO2 than WO3 solid and nano-porous microspheres did. The enhanced NO2 sensing characteristics are explained in relation to the surface area, pore volume, and hollow morphology.
| Original language | English |
|---|---|
| Pages (from-to) | 236-242 |
| Number of pages | 7 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 142 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 Oct 12 |
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Keywords
- Carbon template
- Hollow microspheres
- NO sensor
- WO
ASJC Scopus subject areas
- Instrumentation
- Materials Chemistry
- Surfaces, Coatings and Films
- Metals and Alloys
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Glucose-mediated hydrothermal synthesis and gas sensing characteristics of WO3 hollow microspheres. / Lee, Choong Yong; Kim, Sun Jung; Hwang, In Sung; Lee, Jong Heun.
In: Sensors and Actuators, B: Chemical, Vol. 142, No. 1, 12.10.2009, p. 236-242.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Glucose-mediated hydrothermal synthesis and gas sensing characteristics of WO3 hollow microspheres
AU - Lee, Choong Yong
AU - Kim, Sun Jung
AU - Hwang, In Sung
AU - Lee, Jong Heun
PY - 2009/10/12
Y1 - 2009/10/12
N2 - Tungsten-coated carbon microspheres were prepared by one-pot hydrothermal reaction of an aqueous solution containing glucose and sodium tungstate. The spheres were converted into WO3 hollow microspheres by the decomposition of their core carbon. The [glucose]/[sodium tungstate] ratio of the stock solution determined not only the morphology of the precursors but also the phase of the powders after calcination. The WO3 hollow microspheres showed a higher gas response and more selective detection of 0.5-2.5 ppm NO2 than WO3 solid and nano-porous microspheres did. The enhanced NO2 sensing characteristics are explained in relation to the surface area, pore volume, and hollow morphology.
AB - Tungsten-coated carbon microspheres were prepared by one-pot hydrothermal reaction of an aqueous solution containing glucose and sodium tungstate. The spheres were converted into WO3 hollow microspheres by the decomposition of their core carbon. The [glucose]/[sodium tungstate] ratio of the stock solution determined not only the morphology of the precursors but also the phase of the powders after calcination. The WO3 hollow microspheres showed a higher gas response and more selective detection of 0.5-2.5 ppm NO2 than WO3 solid and nano-porous microspheres did. The enhanced NO2 sensing characteristics are explained in relation to the surface area, pore volume, and hollow morphology.
KW - Carbon template
KW - Hollow microspheres
KW - NO sensor
KW - WO
UR - http://www.scopus.com/inward/record.url?scp=70349253880&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70349253880&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2009.08.031
DO - 10.1016/j.snb.2009.08.031
M3 - Article
VL - 142
SP - 236
EP - 242
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
IS - 1
ER -