Facile synthesis of Fe3O4/SiO2 composite nanoparticles from primary silica particles

被引：116

作者：

Lu, Ziyang ^{[1
]}

Dai, Jie ^{[1
]}

Song, Xiangning ^{[1
]}

Wang, Gang ^{[1
]}

Yang, Wensheng ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, Key Lab Surface & Interface Chem Jilin Province, Changchun 130012, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2008年 / 317卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Fe3O4; magnetic nanoparticle; silica;

D O I：

10.1016/j.colsurfa.2007.11.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A facile method was developed for preparation of Fe3O4/SiO2 composite nanoparticles by direct introduction of Fe3O4 nanoparticles into the Stober process upon formation of the primary silica particles. When the Fe3O4 nanoparticles were added into the reaction mixture at appropriate time, the primary particles can quickly aggregate with the Fe3O4 nanoparticles, thus suppressing the dipole-dipole interactions among the magnetic nanoparticles effectively and allowing the synthesis of Fe3O4/SiO2 composite nanoparticles with defined structure by further deposition of silica layer. Such a method can also be applied for coating silica layer on other water soluble nanoparticles with surface affinity to silica, such as 3-mercaptopropionic acid (MPA) capping ZnS:Mn and citrate modified An nanoparticles. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：450 / 456

页数：7

共 39 条

[1] Manipulation of the magnetic properties of magnetite-silica nanocomposite materials by controlled Stober synthesis [J].