Calcination‐Dependent Surface Defect Variation and Antibacterial Activity of Magnesium Oxide Nanoplates
Xiaoyi Li, Jiao Zhao, Xiaoyu Hong, Yan Yang, Xiaojia Tang, Yimin Zhu, Tie Li
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 ( . O 2 − ) detection, the excellent antibacterial activity of MgO was attributed to the high content of oxygen vacancies, which could result in more . O 2 − 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.