Synthesis of Fe2O3 Nanoparticles and their Catalytic Activity for the Reduction of Halonitroarenes under Sustainable Conditions

Fe2O3 nanoparticles (NPs) with mean size of 50 nm ca. are synthesized starting from a porous organic polymer containing β-ketoesterate Fe(III) sites (Fe-POP), which is annealed at 400 °C under air for 30 min. During calcination, the organic material partially decomposes, and iron(III) oxide NPs onto an organic residue could be observed after annealing. The obtained NPs are characterized by SEM-EDS, IR, and magnetic analyses and they are employed as active catalysts in the reduction of p-bromonitrobenzene into p-bromoaniline, using hydrazine hydrate in ethanol.