Abstract
In this work, glycine-aided combustion synthesis of spinel-type MnCo2−xDyxO4 (x = 0.02,0.04 and 0.06 %) nanocrystalline powders is presented. The mechanism involved in the chemical synthesis is briefly discussed. The integrity of the synthesized nanocrystalline powders was investigated and evaluated in correlation with dysprosium levels. Powder X-ray diffraction and Fourier-transform infrared spectroscopy studies confirmed the formation of pure spinel phase with cubic crystal structure. Scanning electron microscopy examinations revealed different agglomerated porous spongy morphologies that varied with different dysprosium levels. The analyses of X-ray photoelectron spectroscopy spectra showed different mixed oxidation states and cationic distributions among the octahedral and tetrahedral sites within the spinel structure as a function of dysprosium levels. It is suggested that MnCo2−xDyxO4 nanocrystalline powders with different morphologies and mixed oxidation states can be tailored via facile synthesis route.
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