Preparation of Trimodal Macro-meso-microporous Aluminosilicates by Colloidal Crystal/P123 Dual Templates

Polystyrene(PS) microspheres with average diameter of 50nm and 450nm were prepared by step emulsion polymerization and emulsifier-free emulsion polymerization,respectively.On the basis of this,aluminosilicates with macro-meso-micropores were synthesized via in-situ assembly of Y zeolite precursors by PS microspheres/P123 dual templates.The materials with macro-meso-micropores were characterized by means of XRD,SEM and TEM.The results showed that PS microspheres with the diameter of 50nm and 450nm can be obtained by step emulsion polymerization and emulsifier-free emulsion polymerization,respestively.Moreover,influence of various factors including diameters of PS microspheres,amount of templates,and amount of water on the synthesis of the macro-meso-microporous materials were systematically investigated.It was concluded that the composites synthesized by PS microspheres with the larger diameter contained more dispersed macropores.The optimum conditions for aluminosilicates preparation were found to be PS/precursors ratio of 1-0.5,water/precursors ratio of 7.5,and P123/precursors ratio of 0.1.