P-70 オキシアパタイトの合成と光触媒活性能(生体用セラミックス,一般講演(ポスター発表),第56回日本歯科理工学会学術講演会)

概要

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The purpose of this study is to examine synthesis approach of oxyapatite with photocatalytic activity and properties of synthetic oxyapatite. Oxyapatite containing La was synthesized by the dry method or the wet method. The synthetic oxyapatite characterized by using XRD, IR, ESR and TG-DTA analysis, and photocatalytic activity of oxyapatite was evaluated by degradation of methylene blue (MB) under visible light. It was confirmed by XRD and FT-IR analysis that synthetic oxyapatite was Ca_8La_2(PO_4)_6O_2. Furthermore, the ESR spectra of oxyapatite containing reactive oxygen radicals were observed. Most synthetic oxyapatites showed the photocatalytic degradation of MB, whereas there were differences in the efficiency of photocatalytic activity depending on the synthesis condition or the by-product. Thus, these results suggest that oxyapatite (Ca_8La_2(PO_4)_6O_2) with photocatalytic activity serve as an antimicrobial material.
2010-09-20