Synthesis and size control of monodisperse magnesium hydroxide nanoparticles by microemulsion method

Abstract

Uniform and highly dispersed magnesium hydroxide nanoparticles were synthesized in cetyltrimethyl ammonium bromide/cyclohexane/isopropanol/water microemulsion. The effect of different experimental conditions on particle size was investigated and the control mechanism was discussed. The results indicated that the R value (R= [water]/[surfactant]) and the dosage of isopropanol could control the particle size by varying the “water droplet” size in microemulsion; the Mg²⁺ concentration and the mole ratio of Mg²⁺ to OH⁻ could fine tune the particle size by varying the solution supersaturation in water droplet. The dosage of isopropanol had the greatest influence on particle size and could control the particle size in the range of 53.66 to 110.06 nm. Our evidences demonstrate that the magnesium hydroxide particle size can be precisely controlled and could realize better application value.

GRAPHICAL ABSTRACT

Keywords:

• Magnesium hydroxide
• microemulsion
• size control

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (No. 51602069) and Regional demonstration project Foundation of China (No. BHSF2017-16).