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- W3095189920 abstract "Phase-pure magnesium ferrite (MgFe2O4) spinel nanocrystals are synthesized by a fast microwave-assisted route. The elemental composition is optimized via the ratio of the precursor mixture and controlled by energy-dispersive X-ray spectroscopy. Fine-tuning of the magnetic properties without changing the overall elemental composition is demonstrated by superconducting quantum interference device (SQUID) magnetometry and Mössbauer spectroscopy. Together with X-ray absorption spectroscopy and X-ray emission spectroscopy, we confirm that the degree of cation inversion is altered by thermal annealing. We can correlate the magnetic properties with both the nanosize influence and the degree of inversion. The resulting nonlinear course of saturation magnetization (Ms) in correlation with the particle diameter allows to decouple crystallite size and saturation magnetization, by this providing a parameter for the production of very small nanoparticles with high Ms with great potential for magnetic applications like ferrofluids or targeted drug delivery. Our results also suggest that the optical band gap of MgFe2O4 is considerably larger than the fundamental electronic band gap because of the d5 electronic configuration of the iron centers. The presented different electronic transitions contributing to the absorption of visible light are the explanation for the large dissent among the band gaps and band potentials found in the literature." @default.
- W3095189920 created "2020-11-09" @default.
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- W3095189920 date "2020-10-26" @default.
- W3095189920 modified "2023-10-14" @default.
- W3095189920 title "Tailoring the Size, Inversion Parameter, and Absorption of Phase-Pure Magnetic MgFe<sub>2</sub>O<sub>4</sub> Nanoparticles for Photocatalytic Degradations" @default.
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- W3095189920 doi "https://doi.org/10.1021/acsanm.0c02705" @default.
- W3095189920 hasPublicationYear "2020" @default.
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