Controlling of the morphology of Co–Ti LDH

It is known that Mg–Al layer double hydroxide (Mg–Al LDH) possesses plate-like morphology if carefully crystallized. This work focuses on the preparation of Co–Ti LDH having fibrous morphology or mixture of plate-like and fibrous morphologies. The Co–Ti LDH obtained by precipitation for relatively short aging time showed plate-like morphology. By increasing aging time, the plate-like morphology was transformed into fibrous morphology. The percentage of titanium also played an important role to determine the morphology of Co–Ti LDH. The samples having low percentage of titanium 20% and 17% showed plate-like morphology with a small amount of fibrous morphology if prepared from cobalt nitrate. However, the sample having high percentage of titanium 27% showed a large amount of fibrous morphology with a small amount of plate-like morphology. In the sample having 24% of titanium, SEM images showed needles morphology. Furthermore, in the sample prepared from cobalt chloride with low percentage of titanium 17%, the SEM images show the production of a large amount of fibrous morphology.