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<p>In this study, we report the synthesis of a novel magnetic nanocomposite, Fe₃O₄@SiO₂@MgAl-LDH@Au, as an efficient and environmentally benign catalyst for both reduction and oxidation reactions. The mesoporous nanocomposite was well-identified using FT-IR, XRD, EDX, TEM, TGA, FESEM, VSM, BET and XPS analyses. Its catalytic performance was first evaluated in the reduction of 4-nitrophenol to 4-aminophenol, monitored by UV–Vis spectroscopy, which confirmed its remarkable activity in the presence of sodium borohydride as a reducing agent. Furthermore, the catalyst was tested in the oxidation of organic substrates, exhibiting moderate to high conversion and selectivity for benzyl alcohols and alkenes. Notably, Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@MgAl-LDH@Au demonstrated excellent recoverability and reusability over multiple cycles, with only a slight decrease in catalytic activity.</p>

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Magnetic layered double hydroxide supported gold nanoparticles as a robust and recyclable catalyst for the reduction of 4- nitrophenol and oxidation of alkenes and benzyl alcohols

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月19日

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  • Mohammad Mavvaji,
  • Rahman Hosseinzadeh,
  • Shahin Ehsani

摘要

In this study, we report the synthesis of a novel magnetic nanocomposite, Fe₃O₄@SiO₂@MgAl-LDH@Au, as an efficient and environmentally benign catalyst for both reduction and oxidation reactions. The mesoporous nanocomposite was well-identified using FT-IR, XRD, EDX, TEM, TGA, FESEM, VSM, BET and XPS analyses. Its catalytic performance was first evaluated in the reduction of 4-nitrophenol to 4-aminophenol, monitored by UV–Vis spectroscopy, which confirmed its remarkable activity in the presence of sodium borohydride as a reducing agent. Furthermore, the catalyst was tested in the oxidation of organic substrates, exhibiting moderate to high conversion and selectivity for benzyl alcohols and alkenes. Notably, Fe3O4@SiO2@MgAl-LDH@Au demonstrated excellent recoverability and reusability over multiple cycles, with only a slight decrease in catalytic activity.