Photodegradation of 4-chlorobenzaldehyde by photocatalyst containing polyoxometalate

In this work MCM-41 and NaY zeolite were synthesized through hydrothermal process and were used as solid supports for immobilization of vanadium contained polyoxometalate. Polyoxometalates (POMs) exhibit a unique combination of physical and chemical properties. They have been widely used as acid and oxidation catalysts in homogeneous and heterogeneous systems. However , the catalytic activities of the POMs are greatly limited due to their very low specific surface areas (e.g., PMo12O40 < 10 m2/g) ,so polar molecules can only react on the surface of the POMs. Therefore, many attempts have made to enhance the catalytic activity of the POMs. In this work POMs were immobilized on zeolites.