Calcination‐Dependent Surface Defect Variation and Antibacterial Activity of Magnesium Oxide Nanoplates,ChemistrySelect

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Calcination‐Dependent Surface Defect Variation and Antibacterial Activity of Magnesium Oxide Nanoplates
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-03-17 , DOI: 10.1002/slct.201904853
Xiaoyi Li ₁ , Jiao Zhao ₁ , Xiaoyu Hong ₁ , Yan Yang ₁ , Xiaojia Tang ₁ , Yimin Zhu ₁ , Tie Li ₁

Affiliation

Nanostructured magnesium oxide (MgO) is a new kind of environment‐friendly antimicrobial agents with high efficiency, non‐toxicity and relatively low cost. Herein, MgO nanoplates were synthesized by a simple hydrothermal‐calcination method. Antibacterial test showed that the MgO nanoplates calcinated at 450 °C performed the best antibacterial activity, with the antibacterial ratio higher than 99.9 % against Escherichia coli. Based on the results of structural characterization and superoxide radical (^.O₂⁻) detection, the excellent antibacterial activity of MgO was attributed to the high content of oxygen vacancies, which could result in more ^.O₂⁻ production. In addition, the MgO nanoplates exhibited good antibacterial performance at low concentration, and also performed long‐term antibacterial activity. Our method provides a strategy for regulation of surface defects and improvement of antibacterial activity on the pure MgO nanoplates.

中文翻译：

氧化镁纳米板的依赖于煅烧的表面缺陷变化和抗菌活性

纳米结构的氧化镁（MgO）是一种新型的环保型抗菌剂，具有高效，无毒和相对较低的成本。在这里，MgO纳米板是通过简单的水热煅烧方法合成的。抗菌测试表明，在450°C下煅烧的MgO纳米板具有最佳的抗菌活性，对大肠杆菌的抗菌率高于99.9％。基于结构表征和超氧自由基的结果（^。 Ò ₂^-）的检测，MgO的优异的抗菌活性是由于氧空位的高含量，这可能导致更多^。Ø ₂^-生产。此外，MgO纳米板在低浓度下表现出良好的抗菌性能，并且还具有长期的抗菌活性。我们的方法提供了一种策略，可调节纯MgO纳米板上的表面缺陷并提高抗菌活性。

更新日期：2020-03-19

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