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Core-shell-structured carbon nanofiber-titanate nanotubes with enhanced photocatalytic activity

Title
Core-shell-structured carbon nanofiber-titanate nanotubes with enhanced photocatalytic activity
Authors
Kim, SoonhyunKim, MinsunKim, Young KwangHwang, Sung-HoLim, Sang Kyoo
DGIST Authors
Kim, SoonhyunHwang, Sung-HoLim, Sang Kyoo
Issue Date
2014-04-27
Citation
Applied Catalysis B: Environmental, 148, 170-176
Type
Article
Article Type
Article
Keywords
Carbon NanofiberCarbon NanofibersCarbonizationCore-ShellCore-Shell MaterialsCore-Shell Nano StructuresHydrothermal TreatmentsMultifunctionalityNanotubesPhoto-Catalytic ActivitiesPhoto-Catalytic ActivityPhotocatalysisPhotocatalystsShells (Structures)SurfacesSynthesis TechniquesTitanate NanotubesTitanium Dioxide
ISSN
0926-3373
Abstract
Core-shell materials have been developed extensively because of their advanced properties and multifunctionality. Many approaches involving different synthesis techniques have been used for the preparation of various core-shell nanostructures. In this study, we synthesized core-shell-structured carbon nanofiber (CNF)-titanate nanotubes (TiNT) by electrospinning, carbonization, and subsequent alkaline hydrothermal treatment. The CNF core could act as a support, and the TiO2-decorated TiNT shell could act as a photocatalyst. TiNT shells with diameters of several hundreds of nanometers and composed of 10-nm-diameter nanotubes are formed on the CNF surface. The formation of TiNTs on the CNF surface was observed using SEM, HR-TEM, XRD, and XPS analyses. Core-shell-structured CNF-TiNTs exhibited efficient photocatalytic activities for CH3CHO oxidation, which was attributed to the existence of photocatalytically active TiO2-TiNT composites on the CNF surface, which could easily absorb UV light. Additionally, the surface area increase as a result of the alkaline hydrothermal treatment may also be responsible for the efficient photocatalytic activity of core-shell-structured CNF-TiNTs. © 2013 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/5258
DOI
10.1016/j.apcatb.2013.10.051
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Smart Textile Convergence Research Group1. Journal Articles


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