Substrate with a self-cleaning coating

A substrate, comprising:

• a substrate support;
• and
• a coating provided on at least part of a surface of the substrate support;
• wherein:
• the substrate support comprises an essentially transparent substrate, a ceramic substrate, a glass-ceramic substrate, an architectural material substrate, or a fibrous substrate;
• the coating has a mesoporous structure and exhibits photocatalytic properties;
• the coating comprises a coating composition and at least partially crystallized titanium oxide incorporated into the coating composition in the form of perfectly discernible particles;
• the coating composition differs in composition from the at least partially crystallized titanium oxide;
• and
• the substrate is prepared by:
• preparing a liquid composition comprising at least one precursor of the coating composition, and at least one organic structuring agent;
• precipitating the at least one precursor around the at least one organic structuring agent;
• adding the at least partially crystallized titanium oxide to the liquid composition;
• applying the liquid composition to the at least part of the surface of the substrate support;
• and
• removing the organic structuring agent, thereby forming the coating on the substrate.