Abstract: Visible-light-active and photostable, multilayered materials and their preparation method based on surface-modified titanium(IV) oxide have been invented.

Abstract: The invention relates to visible-light active photocatalytic coatings of titanium oxide (IV) on polymer surfaces, characterized in that are applied to a substrate which is the organic polymer material used in medicine, food and pharmaceutical packaging, and the coating is nanocrystalline titanium oxide (IV) or nanocrystalline titanium oxide (IV) surface-modified with organic compound. The invention also includes a method for the preparation of photocatalytic coatings of titanium oxide (IV) according to the invention, comprising the step of activating the surface of a polymeric material with low-temperature plasma technology, and then the synthesis of nanocrystalline titanium oxide (IV) coating and the modification of the surface layer with organic compounds.

Abstract: The present invention relates to a nanocrystalline photocatalyst active upon visible light irradiation, with a high degree of dispersion, stable in the form of a transparent colloidal solution in an aqueous environment, containing nanocrystals of titanium dioxide (TiO2) surface-modified via direct chemisorption of organic compounds. The present invention in turn relates to a method of producing the material as well as its use as a photosterilizer, photobacteriocide, photomycocide, and/or photocatalyst, in particular for the sterilization of glass surfaces, transparent plastics and transparent materials, in particular contact lenses, medical catheters, glass and plastic conduits as well as other surfaces, whose sterilization is desirable and/or required.

Abstract: The present invention relates to a nanocrystalline photocatalyst active upon visible light irradiation, with a high degree of dispersion, stable in the form of a transparent colloidal solution in an aqueous environment, containing nanocrystals of titanium dioxide (TiO2) surface-modified via direct chemisorption of organic compounds. The present invention in turn relates to a method of producing the material as well as its use as a photosteriliser, photobacteriocide, photomycocide, and/or photocatalyst, in particular for the sterilisation of glass surfaces, transparent plastics and transparent materials, in particular contact lenses, medical catheters, glass and plastic conduits as well as other surfaces, whose sterilisation is desirable and/or required.