Patent ID: 7144840

Claim:
A photocatalytic oxidation material comprising: a) 40±10% w/w titanium dioxide crystals having crystal size of 3 nm–25 nm and crystallinity greater than 70%; b) at least 50% w/w polyethylene glycol as a dispersant, said dispersant interacting with the titanium dioxide crystals to prevent aggregation thereof such that the crystal size is maintained at 3–25 nm; and c) 1–10% w/w water, wherein the photocatalytic oxidation material is prepared by a microwave treatment of a mixture of titanium dioxide sol and polyethylene glycol and further comprises surface hydroxyl groups on said titanium dioxide, and wherein 90%–100% of said surface hydroxyl groups are characterized by at least one absorption peak within an infrared spectrum range between 3610–3680 cm −1 when recorded at 150° C.