摘要
以聚乙烯亚胺(PEI)为添加剂,在聚乙二醇(PEG)中高温热分解乙酰丙酮铁(Fe(acac)_3)和乙酰丙酮钴(Co(acac)_2)制备Co_xFe_(3-x)O_4纳米粒子。采用X射线粉末衍射仪(XRD)、透射电镜(TEM)、超导量子干涉仪(SQUID)、热重分析仪(TGA)、傅立叶变换红外光谱仪(FT-IR)、纳米粒度与zeta电位分析仪对样品进行表征。研究结果表明:所得的Co_xFe_(3-x)O_4纳米颗粒平均粒径为9.2±1.3 nm,结晶性好,在室温下具有高的饱和磁化强度。PEG和PEI共同修饰于纳米Co_xFe_(3-x)O_4粒子表面,使纳米Co_xFe_(3-x)O_4粒子具有良好的水分散性。
Co_xFe_(3-x)O_4 nanoparticles were synthesized by thermal decomposition of iron(Ⅲ) acetylacetonate(Fe(acac)_3) and cobalt(Ⅱ) acetylacetonate(Co(acac)_2) in poly(ethylene glycol)(PEG) containing poly(ethylene imine)(PEI) as modifying agents.The products were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM),superconductivity quantum interference device(SQUID),thermogravimetric analysis(TGA),fourier transform infrared spectroscopy(FT-IR) and particles & zeta potential analyzer.The results show that the average grain size of Co_xFe_(3-x)O_4 is about 9.2±1.3 nm.The prepared Co_xFe_(3-x)O_4 nanoparticles have high crystallinity and high saturate magnetization at room temperature.The surfaces of Co_xFe_(3-x)O_4 nanoparticles were modified by PEG and PEI,which provided the nanoparticles excellent water dispersibility.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2016年第1期58-63,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(51162003)
