Antibacterial magnesium hydroxide composition

An antibacterial composition, comprising:

• mesoporous magnesium hydroxide nanoplates with a diameter of 20 nm to 100 nm and a thickness of 0.5 to 30 nm, a mean pore diameter of 2 to 10 nm, a surface area of 50 to 70 m2/g, and a type-III nitrogen adsorption-desorption BET isotherm with a H3 hysteresis loop,
• wherein the mesoporous magnesium hydroxide nanoplates are hollow having a thin-walled shell surrounding an interior void;
• wherein the thin-walled shell has a thickness of 0.1-10 nm;
• wherein the mesoporous magnesium hydroxide nanoplates are not agglomerated;
• wherein the mesoporous magnesium hydroxide nanoplates are substantially free of a surfactant and a template;
• and
• wherein the antibacterial composition has an minimum inhibitory concentration against E. coli of 150 to 350 μg/mL, an MIC against S. aureus of 300 to 700 μg/mL, and/or an minimum inhibitory concentration against K. pneumoniae of 300 to 700 μg/mL.