Abstract

TORRES, Juan A.; CARRIAZO, José G.  and  SANABRIA, Nancy R.. Synthesis and characterization of modified-bentonite with TiO₂ and Fe-TiO₂ species obtained from ilmenite. Rev.Colomb.Quim. [online]. 2013, vol.42, n.1, pp.86-100. ISSN 0120-2804.

A set of nanostructured porous solids was synthesized by intercalation of TiO₂ and Fe- TiO₂ into the interlayer sites of a smectite clay mineral. The new materials were prepared through simultaneous modification of two natural minerals: bentonite and ilmenite. Synthesized materials were characterized by X-ray fluorescence (XRF), infrared spectroscopy (IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and N₂-adsorption technique. Results of chemical analysis (XRF) clearly confirmed the incorporation of titanium and iron in the synthesized materials. Modification of clay mineral by incorporation of titanium dioxide species was verified by XRD, SEM and N₂- adsorption analyses, showing the formation of mesoporous delaminated structures with increased surface areas and controlled porosity.

Keywords : ilmenite; titanium dioxide; bentonite; clay mineral; delaminated clay.

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