醋酸钠诱导的空心Fe_3O_4磁粒制备及表征  

Sodium acetate orientated hollow magnetite nanoparticles fabrication and characterization

作　　者：贺全国[1] 梁静[1] 刘军[1] 

机构地区：[1]湖南工业大学绿色包装与生物纳米技术应用湖南省重点实验室,湖南株洲412007

出　　处：《功能材料》2015年第20期20145-20147,20152,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(61102031);湖南省科技厅重点资助项目(2013SK2003)

摘　　要：采用溶剂热法制备空心结构的Fe3O4纳米粒子,其中用乙二醇作为溶剂和还原剂、六水合三氯化铁(FeCl3·6H2O)作为铁离子源、无水醋酸钠(NaAc)作为碱性试剂和辅助结构指导剂,制备出了平均粒径为222nm、空心结构明显、饱和磁强度为125.00A·m2/kg,且具有良好反尖晶石晶型的Fe3O4纳米粒子。最后推测提出了空心磁粒的形成源自醋酸钠诱导的奥斯特瓦尔德(Ostwald)熟化机理。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.

关 键 词：溶剂热合成 空心磁性纳米粒子 无水醋酸钠诱导 磁性Fe3O4 

分 类 号：TB34[一般工业技术—材料科学与工程] R318[医药卫生—生物医学工程]