Resumo

CARRIAZO, J. G.; SAAVEDRA, M-J.  e  MOLINA, M-F.. XRD study on the intercalation-pillaring of a 2:1 clay mineral with aluminum polyoxocationic species. Rev. Mex. Ing. Quím [online]. 2009, vol.8, n.3, pp.299-305. ISSN 1665-2738.

This work shows the successful intercalation-pillaring of a smectite-type clay mineral (bentonite) with aluminum polyoxocationic species by precursor solutions from basic nitrate, as well as the preparation in solid state of the pillaring agent and its characterization by X-ray diffraction (XRD). The intercalation-pillaring process is carried out through the initial insertion of polycations around 9.6 Å in size and the possible formation of γ-AlOOH after calcined. Characterization of the pillaring agent obtained by direct way from precursor solution (basic aluminum nitrate) allowed the identification of crystalline species whose diffraction patterns show the possible occurrence of the ε-keggin ion (ε-keggin nitrate).

Palavras-chave : pillared clay; keggin ion; intercalation-pillaring; smectite.