Patent ID: 9352302
Filing Date: 2016-05-31
CPC Classification: B01J,B82Y,C01G,C01P,C09C

Claim Text:
1. A process for the synthesis of visible light responsive doped titania photocatalytic nanoparticles, said process comprising the following steps: a) milling a mixture, containing: i) titania; ii) a precursor compound, wherein the precursor compound is at least one selected from the group consisting of chloroauric acid and a mixture containing chloroauric acid and silver nitrate; iii) water; and iv) oxide milling media, wherein the oxide milling media consists of zirconia balls; at a temperature in the range of 20 to 50° C. for a period of 30-240 minutes, to form a slurry, wherein the amount of water is in the range of 15 to 25% by weight of the total mixture; and b) filtering the slurry to separate the oxide milling media from the filtrate and further washing of the filtrate with water to obtain doped titania photocatalytic nanoparticles.