Facile synthesis of 3D Fe2O3 nanostructures: Sponge-like cube shape and bird nest-like architecture

In this report, uniform PB microcubes and carbon microspheres were used as potential templates for the fabrication of 3D porous Fe2O3 nanostructures. The 3D sponge-like γ-Fe2O3 nanocubes were formed by the assembly of numerous fine nanoparticles through the simultaneous oxidative decomposition of PB.