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A novel magnetic NiFe2O4@graphene-Pd multifunctional nanocomposite for practical catalytic application

机译：一种新型磁性NiFe2O4 @ Graphene-PD多功能纳米复合材料，用于实际催化应用

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摘要

In this paper, we report a simple, efficient, and facile strategy to prepare amagnetically separable NiFe2O4@GN-Pd nanocomposite under hydrothermal conditions. This new kind of hybrid material has been fully characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The hybrid is constructed by spherical NiFe2O4 and Pd nanoparticles with the particle sizes in the range of 10-20 nm, which are confined by monolayered GN sheet. The magnetic measurements show that the sample exhibits a typical superparamagnetic behavior, while presents finite coercivity of 9.46 Oe at room temperature. The saturation magnetization of the sample (36.82 emu g(-1)) is significantly lower than that for the reported bulk NiFe2O4 particles (55 emu g(-1)), which also reflects the ultrafine nature of the sample. The as-prepared NiFe2O4@GN-Pd nanocomposite is an ideal recyclable catalyst for liquid-phase reactions owing to its stability and efficient magnetic separation. The Suzuki coupling reaction is used to demonstrate the catalytic efficiency. Additionally, the catalyst is completely recoverable with the simple application of an external magnetic field and the catalytic efficiency shows no obvious loss even after six repeated cycles. The easy synthesis, good magnetic performance and recoverability of the NiFe2O4@GN-Pd nanocomposite make it a promising catalytic material.
机译：在本文中，我们报告了一种简单，有效和轻松的策略，可以在水热条件下制备阳极可分离的NiFe2O4 @ GN-Pd纳米复合材料。这种新型的混合材料已经通过粉末X射线衍射（XRD），傅里叶变换红外光谱（FT-IR），拉曼光谱，X射线光电子能谱（XPS），透射电子显微镜（TEM）和振动样品磁体（VSM）。杂交物由球形NiFe2O4和Pd纳米颗粒构成，颗粒尺寸在10-20nm的范围内，其被单层Gn片局限于单层。磁测量表明，样品表现出典型的超顺磁性，而在室温下呈现9.46 OE的有限矫顽力。样品的饱和磁化（36.82MEU G（-1））显着低于报告的散装NiFe2O4颗粒（55兆克（-1）），这也反映了样品的超细性质。由于其稳定性和有效的磁性分离，所制备的NiFe2O4 @ GN-Pd纳米复合材料是用于液相反应的理想可回收催化剂。 Suzuki偶联反应用于证明催化效率。另外，催化剂随着外部磁场的简单施加而完全可回收，催化效率甚至在六次重复循环后也没有明显的损失。 NiFe2O4 @ GN-Pd纳米复合材料的易于合成，良好的磁性性能和可回收性使其成为有前途的催化材料。

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  • 来源
    《RSC Advances》 |2015年第97期|共8页
  • 作者

    Zhao Xiaohua; Liu Xiang;

  • 作者单位

    Jiangsu Univ Sch Mat Sci &

    Engn Zhenjiang 212013 Peoples R China;

    Zhenjiang Coll Inst Chem &

    Mat Engn Zhenjiang 212000 Peoples R China;

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