Sulfanilic-pillared LDHs Prepared by Different Methods

Sulfanilic-pillared Mg-Al LDHs were prepared by direct anion exchange method,in-situ one step synthesis methods in acidic and alkaline media,and were characterized by IR,XRD and DTA techniques.The effects of synthetic methods on the properties of samples were compared.Results show that the sample prepared by in-situ one step synthesis methods in acidic and alkaline media have better layered structure and crystalline than that of the sample prepared by direct anion exchange method.FT-IR results demonstrated that the preparation of the sample by direct anion exchange method was slightly difficult compared to that of the other methods.DTA combined with the XRD and IR studies of the sample calcined at different temperatures reveal that the host-guest interaction between the layers and the pillars is strengthened with the increased temperature.