期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 33, 期 8, 页码 4871-4875出版社
ELSEVIER
DOI: 10.1016/j.msec.2013.08.003
关键词
Titanium dioxide; Apatite forming ability; Photocatalysis; Plasma electrolytic oxidation
资金
- Ministry of Education, Culture, Sports, Science and Technology [21656184]
- Materials & Structures Laboratory Collaborative Research Project of the Tokyo Institute of Technology
- Grants-in-Aid for Scientific Research [21656184] Funding Source: KAKEN
Plasma electrolytic oxidation (PEO) was used to make a multifunctional porous titanium oxide (TiO2) coating on a titanium substrate. The key finding of this study is that a highly crystalline TiO2 coating can be made by performing the PEO in an ammonium acetate (CH3COONH4) solution; the PEO coating was formed by alternating between rapid heating by spark discharges and quenching in the solution. The high crystallinity of the TiO2 led to the surface having multiple functions, including apatite forming ability and photocatalytic activity. Hydroxyapatite formed on the PEO coating when it was soaked in simulated body fluid. The good apatite forming ability can be attributed to the high density of hydroxyl groups on the anatase and rutile phases in the coating. The degradation of methylene blue under ultraviolet radiation indicated that the coating had high photocatalytic activity. (C) 2013 Elsevier B.V. All rights reserved.
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