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首页> 外文期刊>RSC Advances >Facile protocol for reduction of nitroarenes using magnetically recoverable CoM0.2Fe1.8O4 (M = Co, Ni, Cu and Zn) ferrite nanocatalysts
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Facile protocol for reduction of nitroarenes using magnetically recoverable CoM0.2Fe1.8O4 (M = Co, Ni, Cu and Zn) ferrite nanocatalysts

机译：使用磁性可回收的COM0.2FE1.8O4（M = CO，Ni，Cu和Zn）铁氧体纳米催化剂，用于减少硝基拉酮的化合物方案

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摘要

Transition metal doped cobalt ferrite (CoM0.2Fe1.8O4 (M = Co, Ni, Cu, Zn)) nanoparticles were fabricated using the sol-gel methodology. The obtained ferrite nanoparticles were annealed at 400 degrees C and characterized using Fourier transform infra-red spectroscopy (FT-IR), X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), vibrating sample magnetometry (VSM) and energy dispersive X-ray (EDX) and scanning transmission electron microscopy (STEM). In the FT-IR spectra two bands in the range 1000-400 cm(-1) were observed corresponding to the M-O bond in the tetrahedral and octahedral sites. XRD patterns confirmed the formation of a cubic spinel structure with a Fd (3) over barm space-group. HR-TEM analysis revealed a quasi-spherical shape with particle sizes in the range 20-30 nm for all the synthesized ferrite nanoparticles. The lattice inter-planar distances of 0.29, 0.25, 0.21 and 0.16 nm obtained from HR-TEM corresponding to the (2 2 0), (3 1 1), (4 0 0) and (5 1 1) lattice planes respectively were in complete agreement with the XRD data. The EDX-STEM confirmed the elemental composition as per the desired stoichiometric ratio. The catalytic efficiency of the synthesized ferrite samples was explored for the reduction of nitrophenols. Cu substituted cobalt ferrite nanoparticles (CoCu0.2Fe1.8O4) possessed excellent catalytic activity while CoM0.2Fe1.8O4 (M = Co, Ni and Zn) were inactive for the same. The substrate scope of the developed protocol was also evaluated for the reduction of various CH3-, NH2-, Br-, Cl- etc. substituted nitroaromatic compounds.
机译：使用溶胶 - 凝胶方法制备过渡金属掺杂钴铁氧体（COMO.2FE1.8O4）纳米颗粒。将得到的铁氧体纳米颗粒在400℃下退火，并使用傅里叶变换红外光谱（FT-IR），X射线衍射（XRD），高分辨率透射电子显微镜（HR-TEM），振动样品磁体（VSM）。和能量分散X射线（EDX）和扫描透射电子显微镜（茎）。在FT-IR光谱中，观察到1000-400cm（-1）范围内的两个带对应于四面体和八面体位点中的M-O键。 XRD图案证实了在BARM空间组上使用FD（3）的立方尖晶石结构。 HR-TEM分析显示了所有合成铁氧体纳米颗粒的20-30nm范围内的粒子尺寸的准球形形状。从对应于（2 2 0），（311），（4 0 0）和（51 1）格平面的HR-TEM获得的0.29,0.25,0.21和0.16nm的晶格平面距离为0.29,0.25,0.21和0.16nm与XRD数据完全协议。 EDX-茎根据所需化学计量的比例证实了元素组合物。探讨了合成铁氧体样品的催化效率用于减少硝基苯酚。 Cu取代的钴铁氧体纳米颗粒（Cocu0.2Fe1.8O4）具有优异的催化活性，而COM0.2FE1.8O4（M = CO，Ni和Zn）是相同的。还评价了所发育方案的基质范围，用于减少各种CH3-，NH 2，BR-，CL-等取代的硝基芳族化合物。

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  • 来源
    《RSC Advances》 |2015年第63期|共17页
  • 作者

    Goyal Ankita; Kapoor Surbhi; Samuel Pankaj; Kumar Vinod; Singhal Sonal;

  • 作者单位

    Panjab Univ Dept Chem Chandigarh 160014 India;

    Panjab Univ Dept Chem Chandigarh 160014 India;

    Panjab Univ SAIF Chandigarh 160014 India;

    Icon Analyt Equipment P Ltd Bombay 400018 Maharashtra India;

    Panjab Univ Dept Chem Chandigarh 160014 India;

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  • 正文语种 eng
  • 中图分类 化学;
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