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Optical properties of hierarchical-nanostructured TiO2 and its time-dependent photo-degradation of gaseous acetaldehyde

Title
Optical properties of hierarchical-nanostructured TiO2 and its time-dependent photo-degradation of gaseous acetaldehyde
Authors
Ahn, KyunKim, Min-SunKim, Soon-HyunKim, Jae HyunJeong, Se-YoungKim, Jong-PilJin, Jong SungCho, Chae-Ryong
DGIST Authors
Kim, Soon-HyunKim, Jae Hyun
Issue Date
2013-12-23
Citation
Applied Physics Letters, 103(26)
Type
Article
Article Type
Article
Keywords
AcetaldehydeCommercial TiOContinuous FlowsElectron-Hole SeparationHierarchical NanostructuresNanowiresOxide MineralsPhoto-Catalytic ActivitiesRadiative RecombinationSelf-Trapped ExcitonTitanium DioxideUV-Light Irradiation
ISSN
0003-6951
Abstract
The TiO2 hierarchical nanostructures (HNs) composed of rutile TiO2 nanowires on anatase TiO2 nanofibers had higher photocatalytic activities of 62% and 48% than the commercial TiO2 nanoparticles (∼21 nm diameter) in the continuous flow mode and closed-circulation mode, respectively, leading to an efficient degradation of gaseous acetaldehyde under UV-light irradiation. This behavior may be attributed to the effective TiO2 HNs with specific surface area of 85.1 m 2/g and lower radiative recombination of self-trapped excitons, enabling an effective electron-hole separation. © 2013 AIP Publishing LLC.
URI
http://hdl.handle.net/20.500.11750/5284
DOI
10.1063/1.4857936
Publisher
American Institute of Physics Publishing
Related Researcher
Files:
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Collection:
Smart Textile Convergence Research Group1. Journal Articles


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