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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Microwave-assisted synthesis and magnetic properties of size-controlled CoNi/MWCNT nanocomposites
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Microwave-assisted synthesis and magnetic properties of size-controlled CoNi/MWCNT nanocomposites

机译：尺寸控制的CoNi / MWCNT纳米复合材料的微波辅助合成和磁性能

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摘要

Size-controlled CoNi alloy nanoparticles with average diameters in the range of 15-48 nm attached on the multi-walled carbon nanotubes (MWCNTs) were prepared to form CoNi/MWCNT nanocomposites by microwave-assisted method. The size of CoNi alloy nanoparticles can be controlled through adjusting the atomic ratios of metals to carbon nanotubes in the mixed acetate solution. The as-prepared nanocomposites have been characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), energy-disperse X-ray spectroscopy (EDS) and vibrating sample magnetometer (VSM). The results show that CoNi alloy nanoparticles are face-centered cubic structure, quasi-spherical and disperse uniformly on the surface of MWCNTs. Magnetic measurement shows that both the coercivity and the saturation magnetization of the samples increase with the increase of the particle size from 15 to 37 nm, and decrease from 37 to 48 nm.
机译：制备了附着在多壁碳纳米管（MWCNT）上的平均粒径在15-48 nm范围内的尺寸受控的CoNi合金纳米粒子，通过微波辅助法形成了CoNi / MWCNT纳米复合材料。可以通过调节混合乙酸盐溶液中金属与碳纳米管的原子比来控制CoNi合金纳米颗粒的尺寸。制备的纳米复合材料的特征在于X射线粉末衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），高分辨率透射电子显微镜（HRTEM），选择区域电子衍射（SAED），能量色散X射线光谱仪（EDS）和振动样品磁力计（VSM）。结果表明，CoNi合金纳米粒子为面心立方结构，近似球形，均匀分散在多壁碳纳米管的表面。磁测量表明，样品的矫顽力和饱和磁化强度随粒径从15 nm增大到37 nm而增加，从37 nm减小到48 nm。

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