Nanosized copper ferrite materials: Mechanochemical synthesis and characterization

作者：Manova Elina; Tsoncheva Tanya^*; Paneva Daniela; Popova Margarita; Velinov Nikolay; Kunev Boris; Tenchev Krassimir; Mitov Ivan

来源：Journal of Solid State Chemistry, 2011, 184(5): 1153-1158.

DOI：10.1016/j.jssc.2011.03.035

• Mechanochemical synthesis
• Copper ferrite
• Mossbauer spectroscopy
• Methanol decomposition
• Toluene oxidation

Nanodimensional powders of cubic copper ferrite are synthesized by two-steps procedure of co-precipitation of copper and iron hydroxide carbonates, followed by mechanochemical treatment. X-ray powder diffraction, Mossbauer spectroscopy and temperature-programmed reduction are used for the characterization of the obtained materials. Their catalytic behavior is tested in methanol decomposition to hydrogen and CO and total oxidation of toluene. Formation of nanosized ferrite material is registered even after one hour of milling time. It is established that the prolonging of treatment procedure decreases the dispersion of the obtained product with the appearance of Fe(2)O(3). It is demonstrated that the catalytic behavior of the samples depends not only on their initial phase composition, but on the concomitant ferrite phase transformations by the influence of the reaction medium.

• 出版日期2011-5