Method for photocatalytic activation of structural component surfaces

A method for photocatalytic activation of at least one surface of a structural component having a porous mineral binder matrix produced from an aqueous mixture of at least one mineral inorganic binder and at least one further component selected from the group consisting of an aggregate, an additive, and an admixture comprising the steps of:

• (a) applying water to at least one surface of a structural component to be photocatalytically activated until a water film of water forms;
• b) immediately afterward applying dry fine-particle binder meal particles and fine-particle photocatalytically active particles in meal form to the water film;
• c) allowing the binder meal particles to react with water of the water film;
• d) allowing the water film to disappear;
• and
• e) allowing the binder meal particles to harden to form a binder stone having a hydrate crystal matrix so that the photocatalytically active particles are bound into the binder stone with surfaces of the photocatalytically active particles remaining free and the hydrate crystal matrix firmly combining with the surface matrix of the structural component.