Porous titanium dioxide coatings and methods of forming porous titanium dioxide coatings having improved photocatalytic activity

摘要

Methods for forming porous anatase titanium dioxide coatings are disclosed. Sol-gel compositions are prepared having at least one porosity agent, are applied to a substrate, and at least one porosity agent is removed. Porous anatase titanium dioxide coatings having at least one of improved antimicrobial properties, self-cleaning properties, hydrophilicity, and/or temperability are also disclosed. Substrates comprising such coatings are also disclosed.

主权项

1. A method of forming a porous anatase titanium dioxide coating on a substrate, comprising:
preparing a titanium dioxide sol-gel composition comprising at least one porosity agent; coating the substrate with the sol-gel composition; and removing the porosity agent; wherein the porosity agent is removed by heating the coated substrate at a temperature greater than about 600° C. to form the anatase titanium dioxide coating from the sol-gel composition; wherein the porosity agent is present in the sol-gel composition in an amount comprising at least 5 wt % of the total weight of the sol-gel composition.