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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Fabrication of Monodisperse Magnetite Hollow Spheres
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Fabrication of Monodisperse Magnetite Hollow Spheres

机译：单分散磁铁矿空心球的制备

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Monodisperse Fe3O4 hollow spheres with average diameter of 400 nm and shell thickness of 60 nm were prepared through a one-pot solvothermal process with the presence of NH4AC as the structure-directing agent,and a novel gas-bubble-assisted Ostwald ripening process was proposed to explain the formation of hollow structures.According to this mechanism,hollow Fe3O4 and MnFe2O4 ferrite microspheres with controlled particle size were obtained using urea and ammonia as the structure-directing agents,and porous Fe3O4 spheres with particle size of 100 nm and pore size of 10 nm were obtained by the assistance of bicarbonate of ammonia.X-ray diffraction,scanning electron microscopy,transmission electron microscopy,and high-resolution transmission electron microscopy were used to characterize the structure of synthesized products,and the magnetic property investigation shows that the hollow microspheres exhibit a ferromagnetic behavior and possess a higher saturation magnetization(M_s)than that of the solid microspheres.
机译：以NH4AC为结构导向剂，通过一锅溶剂热法制备了平均直径400 nm，壳厚60 nm的单分散Fe3O4空心球，并提出了一种新型的气泡辅助Ostwald熟化工艺。据此机理，以尿素和氨水为结构导向剂，制备了粒径可控的空心Fe3O4和MnFe2O4铁氧体微球，并制备了粒径为100nm，孔径为100nm的多孔Fe3O4球。借助氨气的碳酸氢盐获得10 nm。用X射线衍射，扫描电子显微镜，透射电子显微镜和高分辨率透射电子显微镜表征了合成产物的结构，磁性研究表明中空微球表现出铁磁行为，并且具有比o高的饱和磁化强度（M_s） f固体微球。

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