Abstract

New double-shelled CoMn2O4 hollow microcubes with nanometer-sized building blocks are prepared by annealing Co0.33Mn0.67CO3 (600 °C, 5 h in air) obtained by coprecipitation from aqueous solutions of Co(NO3)2, MnSO4, EtOH, (NH4)2SO4, and NH4HCO3 (50 °C, 9 h).

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