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Magnetic properties and structural analysis on spinel MnFe2O4 nanoparticles prepared via non-aqueous microwave synthesis

Title data

Simon, Christopher ; Blößer, André ; Eckardt, Mirco ; Kurz, Hannah ; Weber, Birgit ; Zobel, Mirijam ; Marschall, Roland:
Magnetic properties and structural analysis on spinel MnFe2O4 nanoparticles prepared via non-aqueous microwave synthesis.
In: Zeitschrift für anorganische und allgemeine Chemie. (3 September 2021) .
ISSN 1521-3749
DOI: https://doi.org/10.1002/zaac.202100190

Official URL: Volltext

Abstract in another language

Phase-pure 6 nm spinel MnFe2O4 nanoparticles with high specific surface area of 145 m2 g−1 were successfully prepared via microwave-assisted non-aqueous sol-gel synthesis. The phase evolution during postsynthetic thermal treatment was investigated systematically by various methods, including powder X-ray diffraction (PXRD), pair distribution function (PDF) analysis, and Raman spectroscopy. Our results show that the material decomposes to non-spinel binary compounds α-Mn2O3 and α-Fe2O3 at temperatures between 400 and 600 °C. The application potential of MnFe2O4 nanoparticles with 3d5 Mn(II) and Fe(III) ions with respect to the magnetic properties was demonstrated by superconducting quantum interference device (SQUID) magnetometry, with the as-synthesized nanoparticles reaching a high saturation magnetization of 2.62 μB per formula unit (63.5 Am2 kg−1) at 10 K. We further highlight the visible-light response of synthesized powders, making the materials promising for light-related applications, e. g. photocatalytic hydrogen evolution. An important additional feature of MnFe2O4 nanoparticles is their good dispersibilty in polar or non-polar media, as a result of postsynthetic colloidal stabilization with betaine hydrochloride, oleic acid combined with oleylamine, or citric acid.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry III
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry III > Chair Physical Chemistry III - Univ.-Prof. Dr. Roland Marschall
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry IV > Chair Inorganic Chemistry IV - Univ.-Prof. Dr. Birgit Weber
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 13 Oct 2021 08:11
Last Modified: 13 Oct 2021 08:12
URI: https://eref.uni-bayreuth.de/id/eprint/67304