ZHOU Yonghong, FAN Tianbo, LIU Luping, et al. Preparation of hexagonal plates of magnesium hydroxide and mechanism analysis with first principles[J]. CIESC Journal, 2016, (9): 3843-3849.
ZHOU Yonghong, FAN Tianbo, LIU Luping, et al. Preparation of hexagonal plates of magnesium hydroxide and mechanism analysis with first principles[J]. CIESC Journal, 2016, (9): 3843-3849.DOI: 10.11949/j.issn.0438-1157.20160045.
Hexagonal plates of magnesium hydroxide were prepared by one-step hydrothermal method with magnesium nitrate or magnesium chloride as starting materials and gaseous ammonia as precipitator. Scanning electron microscope (SEM) and X-ray powder diffraction (XRD) were employed to characterize the products. The energy
electronic structures and population of exposing plane of all developing facets in the magnesium hydroxide crystals were calculated by the first principle methods based on plane wave pseudo-potential theory. The results showed that the P track played a leading role to maintain lattice structure stability of magnesium hydroxide planes. Total surface energy of (001) plane was lower than all the others
while bonding strength of O-Mg bond and H-Mg bond were strong. Thus
(001) plane had a higher thermodynamic stability
giving a reasonable explanation for morphology of hexagonal plates of magnesium hydroxide.