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Calcination‐Dependent Surface Defect Variation and Antibacterial Activity of Magnesium Oxide Nanoplates
Author(s) -
Li Xiaoyi,
Zhao Jiao,
Hong Xiaoyu,
Yang Yan,
Tang Xiaojia,
Zhu Yimin,
Li Tie
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201904853
Subject(s) - antibacterial activity , calcination , magnesium , hydrothermal circulation , materials science , nuclear chemistry , chemical engineering , oxide , nanotechnology , chemistry , catalysis , bacteria , organic chemistry , metallurgy , genetics , engineering , biology
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.