CA2-05
Montmorillonite-based porous clay heterostructures intercalated
with ZnO-SiO2: Synthesis and characterization
M. Akkari1, P. Aranda2, H. Ben Rhaiem1, A. Ben haj Amara1 and
E. Ruiz-Hitzky2
1
UR05/13-01: Physique des Matériaux Lamellaires et Nanomatériaux Hybrides
(PMLNMH),
Faculté des Sciences de Bizerte, Zarzouna 7021, Tunisia
2
Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049
Madrid, Spain,
Porous clay heterostructures (PCH) were synthesized following a
colloidal route that involves the controlled hydrolysis and
polycondensation of tetramethoxysilane in the presence of organoclay
as starting material. Heating the resulting materials to eliminate the
organic matter. Handling the synthetic parameters was possible to
produces ZnO nanoparticles homogeneously dispersed within the
delaminated clays. The use of alkoxide mixtures containing the Zinc
precursor together with tetramethoxysilane, as a silica precursor, also
gives delaminated silicates containing in this case ZnO/SiO2-clay
materials. Detailed characterization of the obtained materials included:
chemical analyses, transmission electron Microscopy TEM, field
emission scanning electron microscopy SEM-EDX, X-ray diffraction
XRD, thermogravimetric/differential thermal analysis (TG–DTA),
infrared spectroscopy FTIR and specific surface area and porosity
determinations, techniques.
However, these results confirm very well with FE-SEM, It was
observed clearly distribution of the ZnO nanoparticles (NPs)
incorpored on the silica-clay, this texture show “spongy-like” in
materials.
Key words: clays, ZnO nanoparticules (NPs), silica, Porous clay
heterostructures
Matériaux 2015