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

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00006145
URN to cite this document: urn:nbn:de:bvb:703-epub-6145-8

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. Vol. 647 (2021) Issue 22 . - pp. 2061-2072.
ISSN 1521-3749
DOI der Verlagsversion: https://doi.org/10.1002/zaac.202100190

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Abstract

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
Keywords: Spinel ferrites; magnetic nanoparticles; pair distribution function; colloidal stabilization; microwave synthesis
DDC Subjects: 500 Science > 540 Chemistry
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
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry IV
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-6145-8
Date Deposited: 20 Apr 2022 06:06
Last Modified: 20 Apr 2022 06:07
URI: https://epub.uni-bayreuth.de/id/eprint/6145

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