We have synthesized closely packed hexagonal 2D plates and clustered nanoparticle morphologies of Ba(Sb/Ta)2O6 (BSTO) perovskite via the polymerizable complex method for photocatalytic dye degradation activities. The BSTO crystallized in a structure. presence Ba2+, Sb5+, Ta5+, O2− chemical states identified from XPS confirmed formation mixed phase accompanied with minor amount TaOx. Furthermore...