Adipate-Intercalated LDHs Prepared by Different Methods

In this paper,adipate-intercalated LDHs were prepared by direct anion exchange method,acidic one step synthesis method and alkaline one step synthesis method,and were characterized by XRD and IR.The thermal decomposition behavior of the synthesized samples was studied by DTA analysis and the XRD and IR studies of samples calcined at different temperatures.Results show that the pillared products can be prepared using all three methods but the sample prepared by acidic or alkaline one step method has higher crystalline and better layered structure than that of the sample prepared by direct anion exchange method.Results from DTA analyses reveal that the thermal decomposition of pillared LDHs consist of the delimination of the surface adsorption water,the delimination of hydroxyl groups in the brucite-like layers,the oxidation decomposition of the organic anions,and the crystallizing of amorphous oxides obtained during the thermal processing.