Adsorption of some bulky molecules on alumina pillared mica

Samples of alumina pillared fluoro-tetrasilicic mica, one of the pillared c lay minerals, with different amounts of pillar were prepared. Changing the CEC (cation exchange capacity) of the starting mica by the ion-exchange and sintering of Al3+ ion, samples with 1.00 to 4.51 mmol-Al/g-mica were obtai ned, and the pore structures of the resultant porous materials were analyze d by XRD, adsorption of nitrogen, and the adsorption of some bulky dye mole cules. Methylene blue could be adsorbed onto all the samples prepared, but some molecular sieving effects were observed in the adsorption behavior of crystal violet. From these results, it is concluded that the interpillar di stance could be predicted by a simple model described here.