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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Silver nanoparticle embedded copper oxide as an efficient core-shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement
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Silver nanoparticle embedded copper oxide as an efficient core-shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

机译:银纳米粒子嵌入氧化铜作为一种有效的核心壳,用于催化还原4-硝基苯酚和抗菌活性改善

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摘要

A facile and eco-friendly method was developed to prepare a microporous CuO@Ag-0 core-shell with high catalytic and antibacterial activities. Scanning and transmission electron microscopy revealed a preponderance of nearly spherical 50 nm particles with slight structure compaction. Comparison of the hysteresis loops confirmed the structure compaction after AgNP incorporation, and a significant decrease of the specific surface area from 55.31 m(2) g(-1) for CuO to 8.03 m(2) g(-1) for CuO@Ag-0 was noticed. A kinetic study of 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP) with sodium borohydride revealed a first order reaction that produces total conversion in less than 18 minutes. CuO@Ag-0 also exhibited appreciable antibacterial activity against Staphylococcus aureus. The antibacterial effects were found to strongly depend on the size, contact surface, morphology and chemical composition of the catalyst particles. The addition of Ag-0-NPs produced more reactive oxygen species in the bacteria medium. These results open promising prospects for its potential applications as a low cost catalyst in wastewater treatment and antibacterial agent in cosmetics.
机译:开发了一种容易和环保的方法,以制备具有高催化和抗菌活性的微孔CuO @ Ag-0核壳。扫描和透射电子显微镜显示出几乎球形50nm粒子的优势,具有轻微的结构压实。滞后环的比较证实了AgNP掺入之后的结构压实,并且对于CuO @ Ag的CuO至8.03m(2)G(-1)的比55.31m(2)g(-1)的比表面积显着降低-0被注意到了。将4-硝基苯酚(4-NP)还原成4-氨基苯酚(4-AP)的动力学研究含硼氢化钠显示出在少于18分钟的总转化物中产生的第一阶反应。 CuO @ Ag-0也表现出对葡萄球菌的可观抗菌活性。发现抗菌作用强烈取决于催化剂颗粒的尺寸,接触表面,形态和化学组成。添加Ag-0-NPS在细菌培养基中产生了更多的反应性氧。这些结果开放了其潜在应用的希望前景,作为废水处理中的低成本催化剂和化妆品中的抗菌剂。

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    Normandie Univ UNIROUEN INSA Rouen CNRS COBRA UMR 6014 55 Rue St Germain F-27000 Evreux France;

    Normandie Univ UNIROUEN INSA Rouen CNRS COBRA UMR 6014 55 Rue St Germain F-27000 Evreux France;

    Normandie Univ UNIROUEN CNRS PBS UMR 6270 Batiment Pierre Louis DULONG F-76821 Mont St Aignan France;

    IUT Evreux EA 4312 LMSM 55 Rue St Germain F-27000 Evreux France;

    IUT Evreux EA 4312 LMSM 55 Rue St Germain F-27000 Evreux France;

    Normandie Univ UNIROUEN INSA Rouen CNRS COBRA UMR 6014 55 Rue St Germain F-27000 Evreux France;

    Normandie Univ UNIROUEN SMS EA 3233 Rue Tesniere F-76000 Mont St Aignan France;

    Normandie Univ UNIROUEN PBS UMR 6270 Ctr Univ CNRS 1 Rue 7eme Chasseur F-27000 Evreux France;

    Univ Montpellier Inst Charles Gerhardt Montpellier UMR 5253 CNRS ENSCM F-34095 Montpellier France;

    Normandie Univ UNIROUEN PBS UMR 6270 Ctr Univ CNRS 1 Rue 7eme Chasseur F-27000 Evreux France;

    Normandie Univ UNIROUEN PBS UMR 6270 Ctr Univ CNRS 1 Rue 7eme Chasseur F-27000 Evreux France;

    Normandie Univ UNIROUEN INSA Rouen CNRS COBRA UMR 6014 55 Rue St Germain F-27000 Evreux France;

    IUT Evreux EA 4312 LMSM 55 Rue St Germain F-27000 Evreux France;

    Univ Quebec Montreal Dept Chem Nanoqam Montreal PQ H3C 3P8 Canada;

    Normandie Univ UNIROUEN INSA Rouen CNRS COBRA UMR 6014 55 Rue St Germain F-27000 Evreux France;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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