摘要
采用化学共沉淀法制备Fe3O4磁性纳米粒子;用柠檬酸钠进行表面修饰得到在水相中稳定分散的Fe3O4溶胶。以Fe3O4磁性纳米粒子为种子,用碱催化正硅酸四乙酯水解、缩合制备了粒径和磁性可控的核壳结构的Fe3O4@SiO2复合微球。通过FT-IR,XRD,TEM,VSM和古埃磁天平对Fe3O4@SiO2复合微球进行表征。研究了SiO2包覆对Fe3O4@SiO2复合微球性能的影响。
Magnetic Fe3O4 nanoparticles were prepared by chemical coprecipitation and then were stabilized by citrate sodium,and a stable aqueous-base Fe3O4 colloid was obtained.Core-shell structural Fe3O4@SiO2 composite microspheres with adjustable diameter and magnetism were prepared by hydrolysis and condensation of tetraethyl orthosilicate using Fe3O4 nanoparticles as seeds.XRD,TEM,FT-IR,VSM and the Gouy magnetic balance were applied to characterize the Fe3O4@SiO2 composite microspheres.The effects of SiO2 coating on the performance of Fe3O4@SiO2 composite microspheres were investigated.
出处
《合成化学》
CAS
CSCD
北大核心
2010年第4期507-510,共4页
Chinese Journal of Synthetic Chemistry
基金
福建省自然科学基金资助资助项目(2009J01022)
福建省教育厅基金资助项目(JBO7O75)
医学光电科学与技术教育部重点实验室(福建师范大学)测试基金资助项目(JYG0813)
福建省高分子材料重点实验室测试基金资助项目(FJKL-POLY2010-16)
