書誌事項
- タイトル別名
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- Antibacterial Activity of Anatase TiO<sub>2</sub> Added Cu Powder
抄録
<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>
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 70 (3), 121-131, 2023-03-15
一般社団法人 粉体粉末冶金協会
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キーワード
詳細情報 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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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
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- 抄録ライセンスフラグ
- 使用不可