TY - JOUR
T1 - Photoactivity of an anodized biocompatible TiNbSn alloy prepared in sodium tartrate/hydrogen peroxide aqueous solution
AU - Masahashi, N.
AU - Mori, Y.
AU - Kurishima, H.
AU - Inoue, H.
AU - Mokudai, T.
AU - Semboshi, S.
AU - Hatakeyama, M.
AU - Itoi, E.
AU - Hanada, S.
N1 - Funding Information:
The authors wish to acknowledge Mr. I. Nagano, Ms. Y. Matsuda, Ms. M. Tateishi, Mr. I. Narita, Ms. K. Ohmura, Ms. Y. Ohira and Mr. N. Akao from Tohoku University, Dr. Y. Mizukoshi from ULVAC, Inc. and Mr. Y. Miura and Y. Miyao from Hitachi Metals Neomaterials, Ltd. A part of this work was supported by a cooperative program of the Cooperative Research and Development Center for Advanced Materials, IMR, Tohoku University. This study was carried out using research resources by Japan Society for the Promotion of Science (No. 20H02458).
Funding Information:
The authors wish to acknowledge Mr. I. Nagano, Ms. Y. Matsuda, Ms. M. Tateishi, Mr. I. Narita, Ms. K. Ohmura, Ms. Y. Ohira and Mr. N. Akao from Tohoku University, Dr. Y. Mizukoshi from ULVAC, Inc., and Mr. Y. Miura and Y. Miyao from Hitachi Metals Neomaterials, Ltd. A part of this work was supported by a cooperative program of the Cooperative Research and Development Center for Advanced Materials, IMR, Tohoku University. This study was carried out using research resources by Japan Society for the Promotion of Science (No. 20H02458).
Publisher Copyright:
© 2020
PY - 2021/3/30
Y1 - 2021/3/30
N2 - A bioactive TiNbSn alloy was anodized in an electrolyte of sodium tartrate containing hydrogen peroxide (H2O2). The photo-induced characteristics of the anodized alloy were explored by focusing on its crystallinity and electrochemical conditions. The electrolysis curve of the anodization exhibited a higher voltage in the TiNbSn substrate than in the pure Ti substrate. Highly crystallized porous rutile-structured TiO2 was formed on TiNbSn, whereas relatively low-crystallized glassy anatase-structured TiO2 was formed on Ti. The absorption spectra of the oxide, formed on TiNbSn, revealed a steep absorption decrease with increasing wavelength while an explicit transition was not observed for the oxide formed on Ti. The anodized TiNbSn alloy exhibited superior photoactivity and generated hydroxyl radicals under ultraviolet (UV) illumination. The photoactivity of the anodized TiNbSn was attributed to TiO2, which was highly crystallized by the application of a high voltage, thus suppressing the recombination of the photogenerated carriers.
AB - A bioactive TiNbSn alloy was anodized in an electrolyte of sodium tartrate containing hydrogen peroxide (H2O2). The photo-induced characteristics of the anodized alloy were explored by focusing on its crystallinity and electrochemical conditions. The electrolysis curve of the anodization exhibited a higher voltage in the TiNbSn substrate than in the pure Ti substrate. Highly crystallized porous rutile-structured TiO2 was formed on TiNbSn, whereas relatively low-crystallized glassy anatase-structured TiO2 was formed on Ti. The absorption spectra of the oxide, formed on TiNbSn, revealed a steep absorption decrease with increasing wavelength while an explicit transition was not observed for the oxide formed on Ti. The anodized TiNbSn alloy exhibited superior photoactivity and generated hydroxyl radicals under ultraviolet (UV) illumination. The photoactivity of the anodized TiNbSn was attributed to TiO2, which was highly crystallized by the application of a high voltage, thus suppressing the recombination of the photogenerated carriers.
KW - Anodization
KW - Crystallinity
KW - High voltage application
KW - Photocatalysis
KW - Spark discharge
KW - Titanium biomaterial
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U2 - 10.1016/j.apsusc.2020.148829
DO - 10.1016/j.apsusc.2020.148829
M3 - Article
AN - SCOPUS:85098938679
VL - 543
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
M1 - 148829
ER -