Abstract
The Sn3O4 hierarchical microspheres self-assembled from nanosheets were prepared by a hydrothermal reaction of aqueous solution containing SnCl2·2H2O, H2C2O4, HCl, and N2H4·H2O, which were successfully transformed into nano-porous SnO2 hierarchical microspheres for gas sensor applications by heat treatment at 600 °C. The morphology of building blocks within the SnO2 hierarchical spheres could be manipulated from 0-dimensional nanoparticles to 2-dimensional nanosheets by varying the amount of H2C2O4 and N2H4·H2O. The SnO2 hierarchical spheres showed both the ultra-fast response (∼1 s) and high sensitivity to 50 ppm C2H5OH. The dramatic improvement in gas sensing characteristics was explained by the rapid diffusion of the target gas onto the entire sensing materials through the nano-porous network of nanosheets.
| Original language | English |
|---|---|
| Pages (from-to) | 138-143 |
| Number of pages | 6 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 136 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 Feb 2 |
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Keywords
- Fast response
- Gas sensors
- Hierarchical spheres
- Hydrothermal synthesis
- SnO
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
Highly sensitive and ultra-fast responding gas sensors using self-assembled hierarchical SnO2 spheres. / Kim, Hae Ryong; Choi, Kwon Il; Lee, Jong Heun; Akbar, Sheikh A.
In: Sensors and Actuators, B: Chemical, Vol. 136, No. 1, 02.02.2009, p. 138-143.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Highly sensitive and ultra-fast responding gas sensors using self-assembled hierarchical SnO2 spheres
AU - Kim, Hae Ryong
AU - Choi, Kwon Il
AU - Lee, Jong Heun
AU - Akbar, Sheikh A.
PY - 2009/2/2
Y1 - 2009/2/2
N2 - The Sn3O4 hierarchical microspheres self-assembled from nanosheets were prepared by a hydrothermal reaction of aqueous solution containing SnCl2·2H2O, H2C2O4, HCl, and N2H4·H2O, which were successfully transformed into nano-porous SnO2 hierarchical microspheres for gas sensor applications by heat treatment at 600 °C. The morphology of building blocks within the SnO2 hierarchical spheres could be manipulated from 0-dimensional nanoparticles to 2-dimensional nanosheets by varying the amount of H2C2O4 and N2H4·H2O. The SnO2 hierarchical spheres showed both the ultra-fast response (∼1 s) and high sensitivity to 50 ppm C2H5OH. The dramatic improvement in gas sensing characteristics was explained by the rapid diffusion of the target gas onto the entire sensing materials through the nano-porous network of nanosheets.
AB - The Sn3O4 hierarchical microspheres self-assembled from nanosheets were prepared by a hydrothermal reaction of aqueous solution containing SnCl2·2H2O, H2C2O4, HCl, and N2H4·H2O, which were successfully transformed into nano-porous SnO2 hierarchical microspheres for gas sensor applications by heat treatment at 600 °C. The morphology of building blocks within the SnO2 hierarchical spheres could be manipulated from 0-dimensional nanoparticles to 2-dimensional nanosheets by varying the amount of H2C2O4 and N2H4·H2O. The SnO2 hierarchical spheres showed both the ultra-fast response (∼1 s) and high sensitivity to 50 ppm C2H5OH. The dramatic improvement in gas sensing characteristics was explained by the rapid diffusion of the target gas onto the entire sensing materials through the nano-porous network of nanosheets.
KW - Fast response
KW - Gas sensors
KW - Hierarchical spheres
KW - Hydrothermal synthesis
KW - SnO
UR - http://www.scopus.com/inward/record.url?scp=58249137006&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=58249137006&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2008.11.016
DO - 10.1016/j.snb.2008.11.016
M3 - Article
VL - 136
SP - 138
EP - 143
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
IS - 1
ER -