Patent ID: 9701845
Date: 2017-07-11
CPC Classifications: B01J,C01P,C09C

Claim:
1. A pigment comprising a non-metallic substrate, wherein the pigment has at least one barrier layer that selectively absorbs light, electrons, or light and electrons and at least one photocatalytically active layer comprising at least one of titanium oxide, titanium hydroxide and titanium oxide hydrate, wherein the photocatalytically active layer has an average thickness of ≦40 nm, wherein the at least one barrier layer is arranged between the non-metallic substrate and the at least one photocatalytically active layer, wherein the barrier layer comprises at least one of metal oxide, metal hydroxide and metal oxide hydrate, wherein the metal is selected from the group consisting of cerium, zinc and mixtures thereof, wherein the at least one photocatalytically active layer is the outermost inorganic layer, and wherein the barrier layer has a proportion by weight of from 0.1 to less than 5 wt. %, relative to the total weight of the pigment.