Photo-induced properties of anodic oxide films on Ti6Al4V |
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| Authors: | Naoya Masahashi Yoshiteru Mizukoshi Satoshi Semboshi Kazuyo Ohmura Shuji Hanada |
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| Affiliation: | a Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japanb Kansai Center for Industrial Material Research, Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japanc Kansai Center for Industrial Material Research, Institute for Material Research, Tohoku University, Gakuen-cho 1-2, Naka-ku, Sakai, Osaka, 599-8531, Japand Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Miyagi, 980-8577, Japan |
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| Abstract: | Photocatalytic activity and wettability of the anodic oxide layer on Ti6Al4V prepared by anodization in a sulfuric acid electrolyte are explored. The oxide is composed mainly of TiO2 with V2O5, VO2 and Al2O3. The crystal structure of the TiO2 varies from anatase to rutile with the sulfuric acid concentration in the electrolyte. Anatase exhibits better photocatalytic activity compared with rutile, which is different from those on Ti and Ti-Nb-Sn alloy. Contact angles of the oxides decrease with ultraviolet light illumination, and hydrophilicity is observed in the rutile oxide. Both photocatalytic activity and hydrophilicity are inferior to the corresponding Ti and Ti-Nb-Sn alloy, which is explained by the presence of Al2O3 in the anodic oxide. |
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| Keywords: | Photocatalysis Titanium oxide Anodic oxidation Crystal structure Ti6Al4V |
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