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.