全文下载:2012030225
骆华锋
(青岛科技大学 机电工程学院,山东 青岛 266042)
摘要: 由多元醇法制得四氧化三铁纳米粒子,利用Stber水解法在其表面生成了一层无定型二氧化硅包覆层。由于四氧化三铁纳米粒子的特殊表面结构,使其在醇水体系中能够保持良好的胶体稳定性,并与硅酸酯有亲和作用,所得Fe3O4/SiO2复合纳米粒子包覆均匀,尺寸可控。
关键词: 二氧化硅; 四氧化三铁; 纳米粒子; 核-壳结构; Stber法
中图分类号: TM 227; TB 34文献标志码:A
Preparation and Characterization of Silica-coated Magnetic Nanoparticles
LUO Hua-feng
(College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: This paper describes an improved approach of coating superparamagnetic magnetite nanoparticles with amorphous silica shells. Magnetite nanoparticles were prepared by polyol process. The silica coating was deposited on magnetite nanoparticles by the Stber method. As-prepared magnetite nanoparticles can be stable in ethanol-water solution and have a strong affinity to silicate due to their unique surface chemical structures. The core-shell nanoparticles prepared by this method have a uniform shape and controlled size of the shells.
Key words: silica; magnetite; nanoparticles; core-shell structured; Stber method
收稿日期:2011-09-14
基金项目: 山东省自然科学基金项目(ZR2009FL009);亚稳材料制备技术与科学国家重点实验室开放课题项目(200909).
作者简介: 骆华锋(1976—),女,讲师.