Ni-Ti-layered double hydroxide intercalated with β-CD and CM-β-CD: Interaction between the interlayer guests and the laminates

beta-Cyclodextrin (beta-CD) and its derivative carboxymethyl-beta-cyclodextrin (CM-beta-CD) have been intercalated within the gallery of Ni-Ti-layered double hydroxide (LDH), which was prepared by co-precipitation method in alkaline pH. Powder X-ray diffraction (XRD), scanning electron microscope (SEM), fourier-transform infrared spectroscopy (FT-IR) and thermal gravimetric-differential thermal gravimetric (TG-DTG) have been used to characterize the confined beta-CD and CM-beta-CD molecules, whereas intercalation mode have been used to probe the interlayer arrangement and orientation of the intercalated species. The results shown that the intercalation product, which was obtained by the exchange between cyclodextrin and NO3- in Ni-Ti-LDH precursor interlayer, had an ordered crystalline structure. They also confirmed that beta-CD and CM-beta-CD were both inserted into the interlayer along their cavity axes perpendicular and connected with LDH laminates firmly by the chemical action between Ti-OH and C-OH. (C) 2013 Elsevier B.V. All rights reserved.