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.