A europium doped TiO₂−Ta₂O₅ mixed oxide heterostructure prepared by wet impregnation method shows improved visible light absorption than the anatase TiO₂ and undoped TiO₂−Ta₂O₅ heterostructure. The structural analysis suggested the presence of mixed TiO₂ and the orthorhombic Ta₂O₅ phase. The photoactivity of Eu‐doped TiO₂−Ta₂O₅ composites assessed towards the degradation of a model indigo carmine (IC) dye revealed high photodegradation activity than the individual metal oxides. The combination of efficient photo‐excitons separation and enhanced visible‐light absorption are corroborated factors responsible for the upgraded photocatalytic activity. Importantly, the prepared heterostructure found to be photostable and active for six repetitive recycles.