Patent ID: 7578939
Filing Date: 2009-08-25
Classification: B01D,C02F

Abstract:
1. A composite material for purification and filtration of water containing ozone and organic matter which comprises: (a) a microporous to mesoporous inert ceramic filter with a surface; and (b) multilayers of a nanocrystalline, sintered ceramic metal oxide catalyst membrane coating on the surface of the ceramic filter, wherein the multilayers of the metal oxide catalyst coating are formed by applying a coating layer of metal oxide to the surface of the filter followed by a coating layer of phytic acid and repeated by alternating between the metal oxide layer and the phytic acid layer to form at least 20 layers of metal oxide, followed by sintering of the coating multilayers, wherein the metal oxide catalyst coating in use degrades the ozone in the water into hydroxyl or other radicals in situ which react with the organic matter in the water resulting in the removal of the organic matter by the composite ceramic membrane during filtration, and wherein the metal oxide is selected from the group consisting of titanium oxide and manganese oxide.