Antibacterial Activity of Anatase TiO<sub>2</sub> Added Cu Powder
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- HIROTA Ken
- Research center of bio-micro-fluidic science, Doshisha University
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- JINZENJI Ayumu
- Department of Chemical Engineering and Materials Science, Faculty of Science & Engineering, Doshisha University
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- TSUKAGOSHI Kazuhiko
- Department of Chemical Engineering and Materials Science, Faculty of Science & Engineering, Doshisha University
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- TANIGUCHI Yurika
- Graduate School of Engineering, College of Engineering, Osaka Metropolitan University
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- KAWAKAMI Hiroshi
- Graduate School of Engineering, College of Engineering, Osaka Metropolitan University
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- OZAWA Takashi
- Japan Copper Development Association
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- WADA Masahiko
- Japan Copper Development Association
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- YUKI Yoji
- Japan Copper and Brass Association
Bibliographic Information
- Other Title
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- アナターゼ型酸化チタンを添加したCu粉体の抗菌特性
Abstract
<p>To understand the mechanism of antibacterial activity of bulk Cu, N2-atomized Cu powder has been used instead. It was heated from 425 to 673 K in air for 4.2 • 102 s and measured by XRD and Chemi-luminescence (CL) to determine the contents of Cu2O and CuO, and reactive oxygen species (ROS), respectively; ROS being much affected by Cu2O and CuO can play a role to kill bacteria. Cu2O increased from 3.3 mass% (R.T.) to around 20% (673 K), however, CuO was almost constant (1.2~3.5%). High CL intensity was observed for Cu powders heated at 598~673 K. Then, a small amount of anatase TiO2 (a-TiO2) was added and heated at 673 K for 4.2 • 102 s in air, 1% O2-99% N2, and N2. The powder heated under 1% O2 showed the high CL intensity summation (∑CL), especially, 8.0 mol% a-TiO2 added and heated sample (“8.0Ti powder”) gave the about 4.7 times higher ∑CL than the starting material. ESR results using the spin-trap method showed that they contained hydroxyl radical •OH and its intensity increased from starting material to “8.0Ti powder”. However, bio-test proved that these samples revealed the same antibiotic activity. Formation mechanism of ROS (•OH and super oxide radical •O2-) on the surfaces of Cu/Cu2O/CuO has been proposed.</p>
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 70 (3), 121-131, 2023-03-15
Japan Society of Powder and Powder Metallurgy
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Keywords
Details 詳細情報について
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- CRID
- 1390858374981006592
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- ISSN
- 18809014
- 05328799
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed