Synthesis of Cr2O3 nanopowders by microwave-induced solid-state decomposition method: A simple and rapid synthetic route

Author(s): Iran Sheikhshoaie, ZainabTohidiyan

Chromium (III) oxide (Cr2O3) nanopowderswith 27 nmin sizewere synthesized through microwave-induced solid-state decomposition of nitrato (2,3:8,9-diphenanthrene­5,6:11,12-dibenzo- 1,4,7,10 tetraazacyclododecane) chromium(III), [CrL](NO3)3 where (L=C40H28N4), as new precursor in the presence of CuO powder as strongmicrowave absorberwithin a very short reaction time of 10 min. The productwas identified byX-ray diffraction (XRD), Fourier-transformed infrared spectroscopy (FT-IR), Field emission scanning electronmicroscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX). Themicrostructures andmorphologyCr2O3 powders was quasi-spherical shape. The XRD pattern of product showed only the peaks corresponding to chromic (III) oxide. The rhombohedral system and space group R-3c (No. 167) can be considered by using the X-ray powder diffraction data.Microwave- induced combustionmethod is an easyand, safe, low-cost, suitable for high purity production and energy efficientmethod has been reported for the preparation of Cr2O3 nanopowder. Thismethod is an economical method for the preparation of Cr2O3 nanopowder with respect to energy, time and simplicity.

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