Photocatalytic activity of TiO2 thin films deposited by cathodic arc

▶ Anatase films grown by cathodic arcs (CA) were tested as photocatalysts for Cr(VI) reduction. ▶ Films grown by CA showed lower photoactivity than TiO2 P-25 films obtained by dip-coating. ▶ Adhesion properties of CA films were much better. ▶ The reaction efficiency of CA films was improved by increasing the film thickness. ▶ CA films are very suitable for application in gas and aqueous photocatalytic systems.