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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
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)
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
solvothermal synthesis
hollow magneticnanoparticles
anhydrous sodium acetate(NaAc)orientation
magnetite(Fe3O4)
