Photocatalytic Activity of Titanium Dioxide Coated with Apatite
スポンサーリンク
概要
- 論文の詳細を見る
Titanium dioxide coated with apatite (AP–TiO2) was produced by stirring commercial TiO2 (ST-01) into a simulated body fluid (SBF). Radicals generated at the surface of photoaccelerated ST-01 and AP–TiO2 were analyzed by electron spin resonance (ESR) spectroscopy in a spin-trapping experiment. During photoirradiation for 0–60 s, photogenerated [DMPO–OH] for ST-01 and AP–TiO2 increased with irradiation time. On the other hand, during photoirradiation for 60–500 s, [DMPO–OH] for ST-01 decreased but [DMPO–OH] for AP–TiO2 did not. On the basis of these phenomena, it was suggested that DMPO trapped photogenerated OH• and was converted into DMPO–OH which then decomposed to H2O2 upon further photoirradiation. The decomposition of DMPO–OH and generation of H2O2 were prevented by apatite at the surface of TiO2. Additionally, the adsorptive nature of AP–TiO2 for methylene blue and photocatalytic activity for bleaching were improved by apatite at the surface of TiO2.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-07-15
著者
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Ebisu Hiroshi
Department Of Electrical And Computer Engineering Nagoya Institute Of Technology
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ICHIMURA Shuji
Department of Environmental Technology and Urban Planning, Nagoya Institute of Technology
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NONAMI Toru
Faculty of Life System Science and Technology, Chukyo University
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KATO Kazumi
Department of Environmental Technology and Urban Planning, Nagoya Institute of Technology
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Ebisu Hiroshi
Department of Electrical and Computer Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Ichimura Shuji
Department of Environmental Technology and Urban Planning, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Nonami Toru
Faculty of Life System Science and Technology, Chukyo University, 101 Tokodachi, Kaizu-cho, Toyota, Aichi 470-0393, Japan
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Kato Kazumi
Department of Environmental Technology and Urban Planning, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Kato Kazumi
Department of Applied Chemistry, Faculty of Engineering, Nagoya University
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