Hydrothermally synthesized Fe3O4 microparticles: Structural, magnetic, Mössbauer and magneto-hyperthermia properties
We present hydrothermally prepared Fe3O4 microparticles with diverse morphologies such as long micro-rods (LMRs), short micro-rods (SMRs), and micro-disks (MDs) through thermal-reduction of α-Fe2O3as support during the crystallization processes. The impact of PO43− anions was systematically explored...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Results in Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715625000499 |
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| Summary: | We present hydrothermally prepared Fe3O4 microparticles with diverse morphologies such as long micro-rods (LMRs), short micro-rods (SMRs), and micro-disks (MDs) through thermal-reduction of α-Fe2O3as support during the crystallization processes. The impact of PO43− anions was systematically explored with significant influence on tuning the prepared materials' sizes/shapes and phase composition/stoichiometry. A lower concentration of PO43− anions promotes the growth of a mixed iron-oxide phase, for instance, LMRs/SMRs; whereas a higher one results in a pure single-phase cubic Fe3O4structure (MDs) The line shape of the Fe2p region using the multiplets splitting model suggests that Fe3O4 is mainly present at the surface as validated through Mossbauer spectroscopy. Magnetization measurements revealed an alteration of the Verwey transition from LMRs/SMRs to MDs. Further, these microstructures were examined for their efficiencies in adjusting the hyperthermia response, with specific absorption rates peaking from 2.8 to 3.4 W/g and are noticeably dominated by the shape anisotropy. |
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| ISSN: | 2211-7156 |