Synthesis of Layered Double Hydroxides with Novel Morphologies

Generally, the hexagonal plate morphology of Mg-Al layered double hydroxides (LDHs) is more favorable, in this article, we report the synthesis of Mg-Al LDHs with unique morphologies, such as ring-like, fiber-like, and sphere-like particles, respectively, using simple traditional coprecipitation method. This synthesis of MgAl-LDHs were carried out with sodium dodecylsulfate together with Na2-edta, Na2-edta, and sodium tartrate, respectively, as assistants to favor the precipitation process. The obtained products were characterized by transmission electron microscopy, x-ray diffraction, and FTIR spectroscopy. The studied results confirm that morphology of LDHs might be controlled by a soft-template effect of assistants in traditional coprecipitation method.