The Effect of Aging Time on Mg/Al Hydrotalcites Structures

In this study, the Mg/Al hydrotalcites-like compounds with Mg/Al molar ratio of 2 was synthesized by coprecipitation method at pH ± 10.0, temperature 70°C for 1 hour. After cooling, it treated under aging treatment conditions at 30°C. The effect of various aging time on treated samples was studied for 1, 2, 3 and 4 days were chosen. The materials were characterized by powdered sample X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The XRD pattern obtained was typical of a hydrotalcite, where show the narrow and sharp symmetric (003) reflection and strong lines at low 2Ɵ angles. The spectra demonstration wide asymmetric peaks at higher angles, that are typical of clay crystals possessing a layered structure and are similar to the form of natural hydrotalcite. Furthermore, it is shown that aging at an increased time, better crystallinity and the treatment in water slightly than in the mother liquid caused in a crystalline matter