Photocatalytic activity and reusability study of nanocrystalline TiO2 films prepared by sputtering technique

► TiO2 films showed a promising photocatalytic performance after consecutive usages. ► Crystallinity and preferred orientation key parameters on films catalytic activity. ► Presence of vestigial rutile phase favors dye decolorization and TiO2 films reuse. ► Photochemical stability of the TiO2 films after successive photodegradations assays.