Mesoporous aluminosilicates assembled from dissolved LTA precursor

Zeolite Na-A dissolved in a HCl solution was used as aluminum and silica precursors for the synthesis of mesoporous aluminosilicates via a template-assisted method with an organic base tetramethylammonium hydroxide (TMAOH). Increasing the amount of TMAOH in the synthetic solution resulted in an increase in the aluminum content of the products. On the other hand, mesostructural periodicity was deteriorated with higher content of aluminum substituted in the framework. The samples with low Si/Al ratios less than 5 have wormhole-like pore structure, while the samples with Si/Al ratios more than 7 have highly ordered mesoporous structure with crystal like morphology.