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Preparation of mesoporous In2O3 nanofibers by electrospinning and their application as a CO gas sensor

Title
Preparation of mesoporous In2O3 nanofibers by electrospinning and their application as a CO gas sensor
Authors
Lim, SK[Lim, Sang Kyoo]Hwang, SH[Hwang, Sung-Ho]Chang, D[Chang, Daeic]Kim, S[Kim, Soonhyun]
DGIST Authors
Lim, SK[Lim, Sang Kyoo]Hwang, SH[Hwang, Sung-Ho]; Chang, D[Chang, Daeic]; Kim, S[Kim, Soonhyun]
Issue Date
2010-08-06
Citation
Sensors and Actuators, B: Chemical, 149(1), 28-33
Type
Article
Article Type
Article
Keywords
AdsorptionAdsorption and ReactionsBET Surface AreaBrunauer-Emmett-Teller Surface AreasCalcinationCalcining TemperatureCo Gas SensorComposite FibersComposite NanofibersElectrospinningElectrospunsGas DetectorsGas Sensing ElectrodesGas Sensing PropertiesGas SensorGas SensorsHigh Surface AreaIndiumIndium AcetateIndium OxideMeso-PoresMesoporousMetal OxidesNanofibersOrganometallicsPolyvinyl AcetatesPrimary Particle SizeSensorsSurface AreaSurface Sites
ISSN
0925-4005
Abstract
Mesoporous In2O3 nanofibers with a high surface area were synthesized by calcining electrospun polyvinyl alcohol (PVA)/indium acetate composite fibers. A PVA solution and indium acetate were mixed and electrospun. After calcining the PVA/indium acetate composite nanofiber precursor, mesoporous In2O3 nanofibers were successfully formed. These nanofibers had diameters in the range of 150-200 nm and consisted of cubic indium oxide nanocrystals with a primary particle size of 10-20 nm. The Brunauer-Emmett-Teller (BET) surface area of the In2O3 nanofibers was strongly affected by the calcining temperature. The BET surface area of the fibers calcined at 400 °C was significantly higher than the surface area of the nanofibers calcined at 500 °C or 600 °C and of the commercial In2O3 powder. The response of mesoporous In2O3 nanofibers to CO in air is strongly affected by the surface area. The highly elevated response of In2O3 nanofibers calcined at 400 °C could be attributed to the high surface area, which provides a large amount of surface sites for adsorption and reaction of CO. The results demonstrate that the electrospinning approach is an easy and useful method to synthesize metal oxides with mesopores and high surface area, which may enhance their gas sensing properties. © 2010 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3505
DOI
10.1016/j.snb.2010.06.039
Publisher
Elsevier
Related Researcher
Files:
There are no files associated with this item.
Collection:
ETC1. Journal Articles


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