Preparation of zeolite/carbon foam monolithic composites with a hierarchical structure

T-type zeolite/carbon foam composites with a hierarchical structure were prepared by carbonizing polyurethane foam impregnated with a mixture of polyamic acid and T-type zeolite. The carbonization was conducted at 900℃ in flowing nitrogen. The as-prepared composites were examined using SEM, XRD and N₂ adsorption techniques. It has been found that the foam-like monolith consists of open cells with an average size of ca. 500μm, and T-type zeolites are anchored on the cell walls of the foam with their structure remaining unchanged even after heat treatment at 900℃. The zeolite/CF composites with a BET surface area of 328m²/g are microporous, and have a narrow pore size distribution centered at 0.45 nm.