Low temperature synthesis of nano-scale magnesium hydroxide under normal pressure

摘要

In the present paper, nano-scale magnesium hydroxide has been prepared at low temperature via a wet chemical process using MgCl_2- 6H_2O (or Mg(NO_3)_2) and NaOH as the starting reagents under normal pressure. The fresh synthesized magnesium hydroxide nanocrystals were characterized by X-ray diffraction (XRD), selected area electronic diffraction (SAED) and transmission electron microscopy (TEM) measurements. Patterns of XRD and SAED exhibited that the products were high-quality hexagonal crystal system nanocrystals. Though the TEM pictures, large quantities of lamellar-like and needle-like magnesium hydroxide nanocrystals could be observed without obvious aggregation. Using the present method, high yield magnesium hydroxide nanoparticles would be produced without expensive equipments like the high temperature and high-pressure reactor.