Calcination‐Dependent Surface Defect Variation and Antibacterial Activity of Magnesium Oxide Nanoplates. Issue 11 (17th March 2020)

• Record Type: Journal Article
• Authors: Li, Xiaoyi; Zhao, Jiao; Hong, Xiaoyu; Yang, Yan; Tang, Xiaojia; Zhu, Yimin; Li, Tie
• Is Part Of: ChemistrySelect. Volume 5:Issue 11(2020)
• Page Start: 3201
• Page End: 3207
• Publication Date: 2020-03-17
• Subjects: Antibacterial activity -- Escherichia coli -- Hydrothermal synthesis -- Magnesium oxide nanoplates -- Surface analysis; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201904853
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: 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. Abstract : This study investigated the influence of calcination temperature on the surface characterization and antibacterial activity of the MgO nanoplates synthesized by a facile hydrothermal‐calcination method. Surface defects concentration would ensure more . O2 − generation and effectively enhance the antibacterial activity of the MgO nanoplates.