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首页> 外文期刊>RSC Advances >Chemoselective reduction of nitro and nitrile compounds using an Fe3O4-MWCNTs@PEI-Ag nanocomposite as a reusable catalyst
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Chemoselective reduction of nitro and nitrile compounds using an Fe3O4-MWCNTs@PEI-Ag nanocomposite as a reusable catalyst

机译：使用Fe3O4-MWCNTS硝基纳米复合物作为可再用催化剂的硝基和腈化合物的化学选择性减少

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摘要

Multi-walled carbon nanotubes (MWNTs) were modified with carboxylic acid functional groups (MWCNTs-(COOH)(n)) prior to decoration with Fe3O4 nanoparticles. A further modification step by polyethyleneimine (PEI) resulted in Fe3O4-MWCNTs@PEI which provided a suitable platform for coordination and in situ reduction of silver ions to obtain an Fe3O4-MWCNTs@PEI-Ag nanocomposite with highly dispersed Ag nanoparticles. The Fe3O4-MWCNTs@PEI-Ag hybrid material was characterized by various techniques such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA), and was used as an efficient catalyst for chemoselective reduction of nitroaromatic and nitrile compounds to their corresponding amines in aqueous solution at ambient temperature. Nitrofurazone, a cytotoxic antibiotic, as a non-aromatic example was also reduced selectively at the nitro group without reduction of the other functionalities in the presence of Fe3O4-MWCNTs@PEI-Ag. The catalyst was magnetically recoverable and maintained its activity for at least six cycles without considerable loss of efficiency.
机译：用Fe3O4纳米颗粒装饰之前用羧酸官能团（MWCNTS-（COOH）（N））改性多壁碳纳米管（MWNT）。聚乙烯亚胺（PEI）的进一步改性步骤得到Fe3O4-MWCNTS @ PEI，其提供了合适的配位平台，并在原位还原银离子，以获得具有高度分散的Ag纳米颗粒的Fe3O4-MWCNTs @ PEI-Ag纳米复合材料。 Fe3O4-MWCNTs @ PEI-AG杂化材料的特征在于傅立叶变换红外光谱（FT-IR），X射线衍射（XRD），透射电子显微镜（TEM），振动样品磁体（VSM），x -Reay光电子谱（XPS）和热重分析（TGA），用作在环境温度下水溶液中的硝基芳族和腈化合物的硝基芳族和腈化合物的高效催化剂。硝基脲菌，一种细胞毒性抗生素，作为非芳族实例也在硝基组中选择性地减少，而不会在Fe3O4-MWCNTS @ PEI-AG存在下减少其他功能。催化剂是磁性可回收的，并将其活性保持至少六个循环，而不具有相当大的效率损失。

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  • 来源
    《RSC Advances》 |2020年第6期|共12页
  • 作者

    Ansari Sara; Khorshidi Alireza; Shariati Shahab;

  • 作者单位

    Univ Guilan Fac Sci Dept Chem POB 413354914 Rasht Iran;

    Univ Guilan Fac Sci Dept Chem POB 413354914 Rasht Iran;

    Islamic Azad Univ Dept Chem Rasht Branch Rasht Iran;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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