Abstract
We proposed a new method for the formation of a layered columnar structure of carbon-containing montmorillonite by the successive intercalation of polyvinyl alcohol and aluminum polyhydroxocomplexes [Al13O4(OH)24(H2O)12]7+. Polyvinyl alcohol was shown to play an important role, serving as an efficient delaminating agent at the step of polycation intercalation into the interlayer space of montmorillonite and, at the step of pillar formation, to favor the formation of thermally stable layered-columnar structure. It was shown that, irrespective of the amount of polymeric intercalate (at its level of 3–20 wt %), the basal distance in the hybrid materials obtained upon a calcination temperature of 450°C is fixed at a value of d001 = 1.85 nm and greater than that of the conventional Al2O3-pillar montmorrilonite by the thickness of graphene monolayer. The textural characteristics of this layered columnar system can be controlled by the amount of polymer added and by the calcination temperature.
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