TY - JOUR
T1 - Fabrication of a TiO2 photocatalyst by anodic oxidation of Ti in an acetic acid electrolyte
AU - Mizukoshi, Yoshiteru
AU - Masahashi, Naoya
N1 - Funding Information:
The authors wish to thank Ms. Y. Matsuda from IMR, Tohoku University, for preparing samples and evaluating photocatalytic activities, Mr. S. Sugiyama from IMR, Tohoku University, for preparing Ti substrates, and Prof. A. Hayashi and Mr. T. Hakari from Osaka Prefecture University for their helpful assistance with Raman microscopic measurements. This study was partially supported by the Izumi Science and Technology Foundation .
PY - 2014/2/15
Y1 - 2014/2/15
N2 - We anodized Ti substrates in an aqueous acetic acid solution to produce photocatalytic TiO2 films. The TiO2 films were comprised of the anatase phase, but the crystallinity and photocatalytic activity were low, in contrast to films produced by Ti anodization in a sulfuric acid electrolyte. After annealing, the anatase film crystallized and the photocatalytic activity was greatly enhanced. For the anodizations carried out in 0.5 and 2M acetic acid, nonzero current was maintained for the duration of anodization, unlike the other concentrations. We interpret this phenomenon as the layered structure formation from the holes on the substrate surface. Highly crystallized anatase TiO2 therein was thought to mainly contribute to photocatalysis.
AB - We anodized Ti substrates in an aqueous acetic acid solution to produce photocatalytic TiO2 films. The TiO2 films were comprised of the anatase phase, but the crystallinity and photocatalytic activity were low, in contrast to films produced by Ti anodization in a sulfuric acid electrolyte. After annealing, the anatase film crystallized and the photocatalytic activity was greatly enhanced. For the anodizations carried out in 0.5 and 2M acetic acid, nonzero current was maintained for the duration of anodization, unlike the other concentrations. We interpret this phenomenon as the layered structure formation from the holes on the substrate surface. Highly crystallized anatase TiO2 therein was thought to mainly contribute to photocatalysis.
KW - Acetic acid
KW - Anodic oxidation
KW - Crystallization
KW - Photocatalyst
KW - Titanium dioxide
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U2 - 10.1016/j.surfcoat.2013.12.030
DO - 10.1016/j.surfcoat.2013.12.030
M3 - Article
AN - SCOPUS:84894903273
SN - 0257-8972
VL - 240
SP - 226
EP - 232
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -