Abstract :
The layered double hydroxides (LDHs) are
nano-ordered layered compounds and well known for their
ability to intercalate anionic compounds. Most popular
LDHs are prepared conventionally only with divalent and
trivalent cations. In this study, Co–Zr LDH consisting of
divalent and tetravalent cations was prepared and reacted
with monocarboxylic acids at room temperature. The
Co–Zr LDH and intercalated compounds have been characterized
by chemical analysis (C, H, N analysis, ICP, and
ESCA), X-ray powder diffraction, IR spectra, thermal
analysis, 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–Zr LDH showed that the
interlayer spacing of the LDH is 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 morphology of Co–Zr
LDH. The morphology of Co–Zr LDH is plate-like structure
and/or fibrous structure depending on the aging time
