光触媒アパタイトの構造について
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概要
- 論文の詳細を見る
In recent years titanium dioxide (TiO_2) has been widely identified as a photocatalyst. Compound materials with their surface covered with apatite microcrystals have been used in various fields. On the other hand, titanium was substituted for the calcium ion in the apatite crystal. The titanium-ion-substitution apatite exhibited photocatalytic properties and was termed photocatalytic apatite. It is thought that the titanium ion was substituted for column calcium in photocatalytic apatite. However, X-ray diffraction analysis of photocatalytic apatite revealed a feeble peak that was attributed to TiO_2. Therefore, the question arised as to if the titanium signal from the apatite crystals indicated that the titanium existed as titanium dioxide microparticles. To answer this question, photocatalytic apatites with various titanium concentrations were synthesized. Additionally apatites with concentration of 0% titanium and measured amounts of titanium dioxide were also synthesized. Then the photocatalytic apatites with variable concentration of titanium and the apatites with variable concentration of titanium dioxide were compared with them, using X-ray diffraction analysis and chemical analysis. The following results were obtained : (1) The author could not completely deny the possibility that the titanium which existed as titanium dioxide particles had been mixed with apatite particles in the photocatalytic apatite. (2) In the photocatalytic apatite, where the substitution of titanium (IV) for Calcium (II) occurred, the substitution ratio was likely 1 : 1.
- 奥羽大学の論文
- 2004-09-30
著者
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大橋 明石
奥羽大学歯学部口腔衛生学教室
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五十嵐 栄
奥羽大学歯学部口腔衛生学講座
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秋山 哲夫
奥羽大学歯学部化学教室
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五十嵐 栄
山形県米沢歯科医師会
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長岡 正博
奥羽大学歯学部口腔衛生学講座
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大橋 明石
奥羽大・歯・口腔衛生
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長岡 正博
奥羽大・歯・口腔衛生
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植田 正彦
太平化学産業株式会社研究開発部
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植田 正彦
太平化学KK品質保証部
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植田 正彦
太平化学産業株式会社
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秋山 哲夫
奥羽大学歯学部生体材料学講座
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