Visible light responsive doped titania photocatalytic nanoparticles and process for their synthesis

摘要

Present disclosure provides a process for the synthesis of visible light responsive doped titania photocatalysts. The process involves step a) milling a mixture containing titania and a precursor compound, the compound selected from the group consisting of chloroauric acid and a mixture containing chloroauric acid and silver nitrate, in the presence of water and oxide milling media, at a temperature in the range of 20 to 50° C. for a period of 60-120 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 and obtain a filtrate containing doped titania nanoparticles.

主权项

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.