两步法制备核壳结构Fe_3O_4@PDA@BSA纳米复合材料

Preparation of Fe_3O_4@PDA@BSA Core-Shell Nanocomposites by Two-Step Method

采用溶剂热法制备了Fe_3O_4纳米粒子,再经两步法制备了核壳结构Fe_3O_4@PDA@BSA纳米复合材料,并利用X-射线衍射仪(XRD)、透射电镜(TEM)、振动样品磁强计(VSM)对样品形貌及磁性能进行了表征。结果表明,所制备的Fe_3O_4纳米粒子粒径为3~21nm;核壳结构Fe_3O_4@PDA@BSA纳米复合材料的壳层厚度为10~20nm,比饱和磁化强度为58.8emu·g-1,具有良好的磁性能和生物安全性。该方法简单、反应条件温和、绿色环保,具有较好的适用性。

We prepared Fe3O4 nanoparticles by a solvothermal method,and then prepared Fe3O4@PDA@BSA core-shell nanocomposites by a two-step method.Moreover,we characterized the morphologies and magnetic properties of the samples by X-ray diffraction（XRD）,transmission electron microscopy（TEM）,and vibrating sample magnetometer（VSM）.The results indicate that the particle size of Fe3O4 nanoparticle is 3-21 nm.The thickness of the shell and the specific saturation magnetization of Fe3O4@PDA@BSA core-shell nanocomposites are 10-20 nm and 58.8 emu·g^ -1 ,respectively.The Fe3O4@PDA@BSA core-shell nanocomposites have good magnetic property and biological safety.This method has a good applicability with characteristics of simple operation,wild conditions,and environment-friendly application.