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<p>A green and magnetically recoverable heterogeneous nanocatalyst by anchoring Fe<sub>3</sub>O<sub>4</sub> magnetic nanoparticles (MNPs) onto monolayer reduced graphene oxide (rGO), denoted as rGO@Fe<sub>3</sub>O<sub>4</sub>. The Fe<sub>3</sub>O<sub>4</sub> MNPs were found uniformly distributed on the rGO nanosheet, forming a stable and efficient nanoconmposite which was fully characterized through FT-IR, Raman, UV–Vis spectroscopy, XRD, AFM, FESEM, EDX, SEM coupled EDX (SEM mapping), TEM, VSM, ICP, TGA and BET techniques. This catalyst provided a sustainable, recyclable and eco-friendly catalytic platform for the synthesis of 4<i>H</i>-pyrimido [2,1- b] benzimidazoles giving 95–99% yields at lower temperature (45&#xa0;°C) and shorter reaction time (5–10&#xa0;min) compared to the previously reported methods.</p>

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Green synthesis and characterization of monolayer rGO functionalized with Fe3O4 magnetic nanoparticles for efficient and recyclable catalytic production of benzimidazoles

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月15日

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  • Homa Farmani,
  • Hamid Goudarziafshar,
  • Ali Farmani

摘要

A green and magnetically recoverable heterogeneous nanocatalyst by anchoring Fe3O4 magnetic nanoparticles (MNPs) onto monolayer reduced graphene oxide (rGO), denoted as rGO@Fe3O4. The Fe3O4 MNPs were found uniformly distributed on the rGO nanosheet, forming a stable and efficient nanoconmposite which was fully characterized through FT-IR, Raman, UV–Vis spectroscopy, XRD, AFM, FESEM, EDX, SEM coupled EDX (SEM mapping), TEM, VSM, ICP, TGA and BET techniques. This catalyst provided a sustainable, recyclable and eco-friendly catalytic platform for the synthesis of 4H-pyrimido [2,1- b] benzimidazoles giving 95–99% yields at lower temperature (45 °C) and shorter reaction time (5–10 min) compared to the previously reported methods.