Synthesis of Layered Double Hydroxides with Novel Morphologies

Abstract

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.

Keywords:

• Electron microscopy
• layered double hydroxides
• morphology
• x-ray techniques

This research was supported by the National Natural Science Foundation of China (No. 20573065 and 50772062) and the Natural Science Foundation of Shandong Province of China (No. Z2005B02 and Z2006B06).