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<p>Magnetic nanocomposite particles of Fe<sub>3</sub>O<sub>4</sub>/α-FeOOH were synthesized by alkaline coprecipitation from aqueous solutions of di- and trivalent iron salts. The phase composition and magnetic characteristics of the nanocomposite particles as compared to nanoparticles of single-phase Fe<sub>3</sub>O<sub>4</sub> were studied using x-ray structural analysis, Mössbauer spectroscopy, and vibration magnetometry. The sizes of the obtained particles (average diameters of 4-21 nm) and the Debye temperatures Θ<sub><i>D</i></sub> = 273 ± 19 and 327 ± 45 K for Fe<sub>3</sub>O<sub>4</sub> and Fe<sub>3</sub>O<sub>4</sub>/FeOOH, respectively, were determined by various methods. The obtained magnetic characteristics of Fe<sub>3</sub>O<sub>4</sub>/FeOOH (<i>M</i><sub><i>s</i></sub> ≈ 32 emu/g at <i>T</i> = 300 K) allowed this composite material to be used as a reagent in improved oxidation processes followed by magnetic decantation.</p>

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Magnetic Nanocomposites Fe3O4/FeOOH as a Promising Basis for Advanced Oxidation Processes (Fenton Reaction)

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Y. D. Mitskevich,
  • M. M. Degtyarik,
  • A. A. Kharchanka,
  • M. V. Bushinsky,
  • Yu. A. Fedotova,
  • E. S. Voropay

摘要

Magnetic nanocomposite particles of Fe3O4/α-FeOOH were synthesized by alkaline coprecipitation from aqueous solutions of di- and trivalent iron salts. The phase composition and magnetic characteristics of the nanocomposite particles as compared to nanoparticles of single-phase Fe3O4 were studied using x-ray structural analysis, Mössbauer spectroscopy, and vibration magnetometry. The sizes of the obtained particles (average diameters of 4-21 nm) and the Debye temperatures ΘD = 273 ± 19 and 327 ± 45 K for Fe3O4 and Fe3O4/FeOOH, respectively, were determined by various methods. The obtained magnetic characteristics of Fe3O4/FeOOH (Ms ≈ 32 emu/g at T = 300 K) allowed this composite material to be used as a reagent in improved oxidation processes followed by magnetic decantation.