POROUS COATINGS FROM TITANIUM DIOXIDE AND METHODS FOR FORMING POROUS COATINGS FROM TITANIUM DIOXIDE HAVING IMPROVED PHOTOCATALYTIC ACTIVITY

摘要

1. The method of forming a porous coating of titanium dioxide in anatase form on a substrate, comprising:! preparing a sol-gel titanium dioxide composition comprising at least one agent for forming a porous structure; ! coating a substrate with a sol-gel composition; and! removal of a means to form a porous structure. ! 2. The method according to claim 1, where the specified tool for the formation of the porous structure is a polyethylene glycol. ! 3. The method according to claim 2, where the polyethylene glycol is present in the sol-gel composition in an amount comprising at least about 5 wt.% Of the total weight of the sol-gel composition. ! 4. The method according to claim 3, where the polyethylene glycol is present in the sol-gel composition in an amount comprising at least about 10 wt.% Of the total weight of the sol-gel composition. ! 5. The method according to claim 4, where the polyethylene glycol is present in the sol-gel composition in an amount comprising at least about 20 wt.% Of the total weight of the sol-gel composition. ! 6. The method according to claim 1, where the substrate includes a glass substrate. ! 7. The method according to claim 6, where the glass substrate is selected from transparent glass or glass with a low iron content. ! 8. The method according to claim 1, where the means for the formation of the porous structure is removed by heating the coated substrate to a temperature of more than approximately 600 ° C. ! 9. A method of improving at least one of the antibacterial properties, self-cleaning properties, hydrophilicity and resistance to the effects of the temperature of the coating of titanium dioxide, including:! preparation of a sol-gel composition of titanium dioxide, including at least one agent for the formation of