Patent ID: 7521084
Filing Date: 2009-04-21
Classification: B01J

Abstract:
1. A method for manufacturing a titanium dioxide composite ceramic material on which photoactive (photooxidative) apatite or another calcium phosphate monocrystals are partially deposited, said method comprising immersing titanium dioxide in an aqueous solution comprising an excess of phosphorus ions and calcium ions in comparison with an artificial body fluid, forming and aggregating calcium phosphate clusters and producing octacalcium phosphate, converting the octacalcium phosphate into an apatite or other calcium phosphate Ca 9 (PO 4 ) 6 monocrystal, and then growing the monocrystal, to fabricate a titanium dioxide photocatalyst composite material on which a compound composed of one or more apatite or other calcium phosphate Ca 9 (PO 4 ) 6 monocrystals is partially deposited, wherein the aqueous solution containing phosphorus ions and calcium ions comprises 200 to 3000 mM of Na