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Sodium acetate orientated hollow magnetite nanoparticles fabrication and characterization

HE Quanguo;LIANG Jing;LIU Jun;Key Laboratory of Green Packaging and Biological Nanotechnology Application of Hunan Province,Hunan University of Technology;  
Monodispersed magnetite(Fe3O4)nanospheres with hollow or porous interior structures were prepared via a facile one-pot solvothermal route.The simple fabrication process was characterized by using iron(Ⅲ)chloride hexahydrate(FeCl3·6H2O)as only ferric ion resource and anhydrous sodium acetate(NaAc)as structure-directing agent in an ethylene glycol solution without templates or surfactants involved.We prepared the hollow-structured magnetite nanoparticles with an average particle diameter of 222 nm,and saturation magnetization intensity of 125.00A·m2/kg,and they were inverse spinel crystal.A plausible mechanism based on sodium acetate orientation and subsequent local Ostwald ripening was proposed.
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