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Keywords
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layered double hydroxide, crystallinity, amine, magnesium, aluminum.
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Abstract
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In the present work, layered double hydroxides of Mg–Al were synthesized with nitrate interlayer anions in the
presence of different types of amines such as ethylenediamine, dimethylamine, and trimethylamine, without a N2 atmosphere,
from a homogeneous solution using the coprecipitation method. The concentration of the different types of amines and pH of
the solution were adjusted to produce high-purity and -crystallinity samples. The structure and morphology of layered double
hydroxides were characterized and investigated by powder X-ray Diffraction, Fourier transform infrared spectroscopy, field
emission scanning electron microscopy, and thermogravimetric analysis techniques. The analyses showed that with increasing
amine concentration, both crystallinity and purity of the samples increase at pH 10.5.
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