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One-pot synthesis and magnetic properties of hollow Fe70Co30 nanospheres

机译:空心Fe70Co30纳米球的一锅合成及磁性

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Hollow Fe70Co30 nanospheres have been prepared in aqueous solution with KBH4 as the reducing agent and sodium dodecyl sulfonate ( SDS) as the stabilizing agent. The diameter of these spheres is about 100 - 200 nm and the shell thickness is about 15 - 20 nm. By transmission electron microscopy ( TEM) analysis, it was found that these hollow spheres formed via an in situ galvanic replacement reaction between iron nanoparticles and the cobalt cation. These hollow Fe70Co30 spheres exhibit surface plasmon resonance ( SPR) absorption in the ultraviolet - visible spectrum. The magnetic properties of the as- prepared hollow Fe70Co30 nanospheres and of a sample annealed at 573 K were studied. Annealing the product can greatly enhance the saturation magnetization Ms and coercivity H-c.
机译:在水溶液中制备了空心Fe70Co30纳米球,其中KBH4作为还原剂,十二烷基磺酸钠(SDS)作为稳定剂。这些球的直径约为100-200nm,壳的厚度约为15-20nm。通过透射电子显微镜(TEM)分析,发现这些空心球是通过铁纳米颗粒与钴阳离子之间的原位电置换反应形成的。这些中空的Fe70Co30球在紫外可见光谱中表现出表面等离子体共振(SPR)吸收。研究了制备的空心Fe70Co30纳米球和在573 K退火的样品的磁性能。对产品进行退火可以大大提高饱和磁化强度Ms和矫顽力H-c。

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