Effect of Synthesizing Process on the Formation of Fe3O4 Magnetic Nanoparticles

AKA, Cemal , AKYOL, Mustafa
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Abstract

In this work, the effect of synthesizing process on the morphology, structure, and magnetic properties of Fe3O4 magnetic nanoparticles have been studied by performing X-ray diffraction, scanning electronic microscopy, and vibrating sample magnetometer measurements. Fe3O4 nanoparticles were synthesized by hydrothermal and solvothermal methods. X-ray diffraction analysis revealed that both samples have cubic crystal phase. However, Fe2O3 impurity peaks were observed in the sample synthesized by hydrothermal method. The crystallite sizes of samples synthesized by hydrothermal and solvothermal methods were approximately 38 and 24 nm, respectively. The scanning electron microscope images show that spherical porous and cubic shape Fe3O4 nanoparticles were obtained by solvothermal and hydrothermal method, respectively. The average particle sizes of Fe3O4 samples synthesized by hydrothermal and solvothermal methods were determined as 220 and 450 nm, respectively. Both samples behave a soft ferromagnetic characteristic having almost zero coercive field. The magnetic saturation values of Fe3O4 nanoparticles synthesized by hydrothermal and solvothermal methods were determined as 28.78 and 77.31 emu/g, respectively. As a result of the characterizations, porous Fe3O4 nanoparticles synthesized by solvothermal method show better crystal structure, morphological and magnetic properties than Fe3O4 nanoparticles synthesized by hydrothermal method.
合成工艺对Fe3O4磁性纳米颗粒形成的影响
本文通过x射线衍射、扫描电镜和振动样品磁强计测量,研究了合成工艺对Fe3O4磁性纳米颗粒形貌、结构和磁性能的影响。采用水热法和溶剂热法合成了纳米Fe3O4。x射线衍射分析表明,两种样品均具有立方晶相。水热法合成的样品中存在Fe2O3杂质峰。水热法和溶剂热法合成的样品晶粒尺寸分别约为38 nm和24 nm。扫描电镜图像显示,溶剂热法和水热法制备的Fe3O4纳米颗粒分别为球形、多孔和立方形状。水热法和溶剂热法合成的Fe3O4样品的平均粒径分别为220 nm和450 nm。两种样品均表现为软磁特性,矫顽场几乎为零。水热法和溶剂热法合成的Fe3O4纳米颗粒的磁饱和值分别为28.78和77.31 emu/g。表征结果表明,溶剂热法制备的多孔Fe3O4纳米颗粒比水热法制备的Fe3O4纳米颗粒具有更好的晶体结构、形貌和磁性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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