Abstract:

The hierarchical porous aluminosilicate material was obtained by hydrothermal treatment and calcination of the precursor prepared using polystyrene spheres coated with polyelectrolyte as the template. The hierarchical porous materials were characterized by XRD, FT-IR, N2 adsorption-desorption, SEM and TEM. In addition, the influence of crystallized time on the porous structures was studied. The results show that the material contained meso-macropore with hydrothermal treatment of less than 22 h. However, the sample exhibits micro-meso-macroporous structures when the crystallized time was more than 22 h. In particular, the XRD and SEM results exhibit that the wall of macro-pore was composed of nano-ZSM-5 zeolite when the sample was crystallized for 36 h.

Key words: hierarchical porous, aluminosilicate material, Layer-by-layer self-assembly