Preparation and characterization of a new nano-structural material, Co-Sn LDH

Anionic clays or layered double hydroxides (LDHs) are one of the nano ordered layered materials. The layered double hydroxide well known for its ability to intercalate anionic compounds is prepared conventionally only with divalent and trivalent cations, hi this study, Co-Sn LDH consisting of divalent and tetravalent cations was prepared and reacted with monocarboxylic acids at room temperature. The Co-Sn LDH and intercalated compounds were characterized by chemical analysis (C, H, N analysis, ICP and ESCA), energy dispersive X-ray spectrometer (EDS), X-ray powder diffraction (XRD), infrared spectra (IR), thermal analyses (TG, DTG and DTA) and scanning electron microscope (SEM). The insertion of cyanate and carbonate anions into LDH was confirmed by chemical analysis and IR spectra. XRD patterns of the prepared Co-Sn LDH showed that the interlayer spacing of the LDH was 0.78 nm. The spacing was similar to that of usual LDH in which chloride, carbonate or bromide anion is the guest. SEM images showed that the aging time plays a vital role in the formation of Co-Sn LDH. The morphology of Co-Sn LDH was plate-like structure and/or fibrous structure depending on the aging time and the kind of interlayer anion