Preparation and characterization of novel porous metal/ceramic catalytic membrane materials

In order to obtain improved separation or catalytic activity, we propose a method to modify the surface of porous ceramic membranes by modifying the surface of sol particles. The key technical difficulty of this method is how to get appropriate ligands which can make metal ions adsorb on sol particles in the appropriate pH range in which the sol maintains its dynamic stability. Pd/γ-A1₂O₃ catalytic membrane materials with mesopore and a narrow pore size distribution were prepared by this method. Other kinds of metal/ceramic catalytic membrane materials such as Ni/γ-Al₂O₃, Pt/γ-Al₂O₃ can also be obtained by the same method.