Rutile titania nano sols and process for manufacturing the same

A process for manufacturing water-dispersible rutile nano sol particles consisting of titania, comprising the steps of:

• i) manufacture of a mixed solvent consisting of water and hydrogen peroxide;
• wherein a mole ratio of water to hydrogen peroxide is 10-20;
• ii) having hydrolysis and the formation of peroxotitanate occur simultaneously by dropping down titanium tetraisopropoxide to said mixed solvent of water and hydrogen peroxide, wherein a mole ratio of titanium tetraisopropoxide to hydrogen peroxide is 0.01-0.03;
• and
• iii) hydrothermal treatment at 90-120° C. for 3-24 hours of an aqueous solution in which said peroxotitanate is dissolved,
• wherein the steps i), ii) and iii) are performed in that order.