Multifunctional porous titanium oxide coating with apatite forming ability and photocatalytic activity on a titanium substrate formed by plasma electrolytic oxidation

T. Akatsu, Y. Yamada, Y. Hoshikawa, T. Onoki, Y. Shinoda, F. Wakai

    Research output: Contribution to journalArticlepeer-review

    30 Citations (Scopus)

    Abstract

    Plasma electrolytic oxidation (PEO)was used tomake a multifunctional porous titaniumoxide (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 anammoniumacetate (CH3COONH 4) solution; the PEO coatingwas 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.

    Original languageEnglish
    Pages (from-to)4871-4875
    Number of pages5
    JournalMaterials Science and Engineering C
    Volume33
    Issue number8
    DOIs
    Publication statusPublished - 2013 Dec 1

    Keywords

    • Apatite forming ability
    • Photocatalysis
    • Plasma electrolytic oxidation
    • Titanium dioxide

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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