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http://dx.doi.org/10.4191/KCERS.2008.45.6.331

Distribution of Anatase Phase Depending on the Thermal Treatment Temperature of Tio2 Nanotubes and Its Effects on the Photocatalytic Efficiency  

Kim, Se-Im (Department of Materials Science and Engineering, Kumoh National Institute of Technology)
Hwang, Ji-Hun (Department of Materials Science and Engineering, Kumoh National Institute of Technology)
Lee, Seung-Wook (Department of Materials Science and Engineering, Kumoh National Institute of Technology)
Kim, Rak-Kyoung (Department of Materials Science and Engineering, Kumoh National Institute of Technology)
Son, Su-Min (Department of Materials Science and Engineering, Kumoh National Institute of Technology)
Shaislamov, Ulugbek (Department of Materials Science and Engineering, Kumoh National Institute of Technology)
Yang, Jun-Mo (National Nanofab Center, KAIST)
Yang, Bee-Lyong (Department of Materials Science and Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Ceramic Society / v.45, no.6, 2008 , pp. 331-335 More about this Journal
Abstract
The purpose of this study is to characterize the photo-catalytic efficiency of $TiO_2$ nanotube with respect to the distribution of anatase phase which can be changed by the annealing temperature of $TiO_2$ nanotube. $TiO_2$ nanotube was fabricated by the anodization method in the 0.5 wt% HF electrolyte. And then the $TiO_2$ nanotube was annealed at temperatures ranging from $380^{\circ}C$ to $780^{\circ}C$ in dry oxygen ambient for 2 h. For the photo-catalytic water-splitting tests, the photocurrent density was measured as a function of applied potential with a potentiostat using a Ag/AgCl reference, Pt counter electrode, and 1 M KOH electrolyte under illumination of UV by a Xe arc lamp of 1 KW. According to the UV photo-catalytic water-splitting tests, the nanotube annealed at $560^{\circ}C$ was found to show the highest photocurrent density.
Keywords
Photo-catalytic; Nanotube$TiO_2$$TiO_2$ nanotub; Crystallization;
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