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Sonochemical synthesis and chracterization of Mn3O4 nanoparticles

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2010-06-01T00:00:00Z
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Baykal, Abdulhadi
Kavas, Hueseyin
Durmus, ZEHRA
Demir, Mine
Kazan, Sinan
Topkaya, Ramazan
Toprak, Muhammet S.
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Abstract
We report on the synthesis of Mn3O4 nanoparticles (NPs) using a novel sonochemical method without requiring any pH adjustment. Synthesized material was identified as tetragonal hausmannite crystal structure model of Mn3O4 from XRD analysis. Crystallite size was estimated from x-ray line profile fitting to be 17 +/- 5 nm. FTIR analysis revealed stretching vibrations of metal ions in tetrahedral and octahedral coordination confirming the crystal structure. TEM analysis revealed a dominantly cubic morphology of NPs with an average size of similar to 20 nm. Magnetic evaluation revealed a blocking temperature, T-B of 40 K above which the material behaves paramagnetic. Asymmetric coercive field is attributed to the interaction between ferromagnetic Mn3O4 and antiferromagnetic Mn oxide at the surface of nanoparticles.
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Baykal A., Kavas H., Durmus Z., Demir M., Kazan S., Topkaya R., Toprak M. S. , -Sonochemical synthesis and chracterization of Mn3O4 nanoparticles-, CENTRAL EUROPEAN JOURNAL OF CHEMISTRY, cilt.8, ss.633-638, 2010
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