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<p>Iron oxides were synthesized via green and chemical approach due to importance of this metal oxide in wastewater treatment. The characterization of products was performed utilizing X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Brunauer–Emmett–Teller (BET), and field emission scanning electron microscopy (FE-SEM) analyses. The intervention of plant extract significantly influenced the phase, morphology, size, and porosity of the resulting products. Mesoporous paramagnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles were produced using green method. Conversely, nonporous cubic Fe<sub>2</sub>O<sub>3</sub> was formed in the chemical method. The average particle size of spherical Fe<sub>3</sub>O<sub>4</sub> nanoparticles was 36.12&#xa0;nm. The specific surface area and average pore size of the nanoparticles were determined as 165&#xa0;m<sup>2</sup>.g<sup>−1</sup> and 3.32&#xa0;nm, respectively. The dye adsorption followed the pseudo-second-order kinetic model, with a maximum capacity of 35.44&#xa0;mg.g<sup>−1</sup>. Furthermore, the as-prepared Fe<sub>3</sub>O<sub>4</sub> nanoparticles exhibited a robust saturation magnetization of 31.09&#xa0;emu.g<sup>−1</sup>, enhancing their potential for effective application in wastewater treatment.</p> Graphical Abstract <p></p>

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Selective Synthesis of Mesoporous Magnetic Iron Oxide Nanoparticles via Green Approach: Highly Efficient Adsorption of Malachite Green

  • 期刊论文

  • 发表日期：

    2025年1月2日

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  • Maliheh Yaghoobi,
  • Fatemeh Asjadi

摘要

Iron oxides were synthesized via green and chemical approach due to importance of this metal oxide in wastewater treatment. The characterization of products was performed utilizing X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Brunauer–Emmett–Teller (BET), and field emission scanning electron microscopy (FE-SEM) analyses. The intervention of plant extract significantly influenced the phase, morphology, size, and porosity of the resulting products. Mesoporous paramagnetic Fe3O4 nanoparticles were produced using green method. Conversely, nonporous cubic Fe2O3 was formed in the chemical method. The average particle size of spherical Fe3O4 nanoparticles was 36.12 nm. The specific surface area and average pore size of the nanoparticles were determined as 165 m2.g−1 and 3.32 nm, respectively. The dye adsorption followed the pseudo-second-order kinetic model, with a maximum capacity of 35.44 mg.g−1. Furthermore, the as-prepared Fe3O4 nanoparticles exhibited a robust saturation magnetization of 31.09 emu.g−1, enhancing their potential for effective application in wastewater treatment.

Graphical Abstract