Abstract
The main goal of present work was to show a new method of synthesis, of manganese ferrite (MnxFe3-xO4, x = 0.085 to x = 0.379) with variable composition of Fe(II), Fe(III) and Mn(II) ions by coprecipitation, with the application of KMnO4 and KNO3 as oxidizing agents, followed by the characterization and research of the catalytic properties of the prepared samples. The chemical analysis by Flame Atomic Absorption Spectroscopy (FAAS), X-Ray Fluorescence Spectroscopy (XRFS) and potentiometric titration, allows to calculate the elemental and ionic composition of the prepared ferrites. The use of KMnO4 enables not only the oxidation of iron(II) to iron(III) but also a source of manganese(II). The Mn substitution in MnxFe3-xO4 ferrite as well as higher gel dispersion, cause the exponential increase of the catalytic activity, which is more significant in smaller particles.
Published Version
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