Abstract

Here, we showed the effect of hydrothermal treatment and aging process of urea hydrolysis on crystal structure, particle size and particle size distribution of Mg - Al layered double hydroxide (LDH) materials. The obtained materials were characterized by X-ray crystallography and scanning electron microscopy. The studied synthetic parameters showed a great influence on the physicochemical properties of the selected LDH materials. At insufficient conditions of hydrothermal treatments, the formed LDH particles were amorphous and the non-LDH phases dominated the X-ray diffraction chart. The crystal growth increased with increasing hydrothermal temperature. Aging process improved the crystal morphology up to18 hours, while further aging destroyed the LDH particles. The increase of hydrothermal aging led to a wide particle size distribution.

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