Abstract
This chapter discusses the preparation of zeolite Beta/polystyrene beads and the corresponding hollow spheres. Zeolite shells on polystyrene beads are prepared by a combination of layer-by-layer and hydrothermal synthesis techniques. The negatively charged polystyrene beads are surface modified to adsorb zeolite Beta nanocrystals. Such particles are then adsorbed on the surface of the beads and induced to grow into a continuous film of intergrown crystals of zeolite Beta. The effect of the preliminary treatment on the formation of the zeolite film is studied.The polystyrene beads used as macro-templates are removed by calcination in air, yielding hollow spheres of zeolite Beta. The zeolite Beta/polystyrene composites and the corresponding hollow zeolite spheres are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric/differential thermal analysis TG/DTA, and Brunauer–Emmett–Telle (BET) surface area measurements.
Published Version
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