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四氧三铁具有良好的化学稳定性和生物相容性以及优异的磁性能,在磁介质存储、传感器、微波吸收和生物医学等领域具有巨大的应用价值。以六水氯化铁(FeCl3·6H2O)作为铁源,乙二醇(C2H6O2)作为溶剂和还原剂,无水醋酸钠为配位剂,柠檬酸钠作为稳定剂,采用溶剂热法制备了高磁饱和强度的Fe3O4纳米簇颗粒。用X射线衍射仪(XRD)、场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)和振动样品磁强计(VSM)对其物相、形貌和磁性能进行了表征。结果表明:纳米簇为均匀球形,由大量微小的Fe3O4纳米晶体组成。纳米簇的平均粒径为268nm,粒径分布较窄。其在室温条件下的磁滞回线表现出顺磁性,其饱和磁化率为65emu/g。
Possessing good chemical stability and biocompatibility, as well as excellent magnetic properties, TEA has great application value in the fields of magnetic media storage, sensors, microwave absorption and biomedicine. Hexavalent ferric chloride (FeCl3 · 6H2O) as iron source, ethylene glycol (C2H6O2) as a solvent and a reducing agent, anhydrous sodium acetate as a complexing agent, sodium citrate as a stabilizer, prepared by solvothermal high Magnetic saturation intensity of Fe3O4 nanocluster particles. The phase, morphology and magnetic properties were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The results show that the nanoclusters are uniformly spherical and consist of a large number of tiny Fe3O4 nanocrystals. The average diameter of nanoclusters is 268nm, and the particle size distribution is narrow. Its hysteresis loop exhibits paramagnetic at room temperature with a saturation magnetization of 65 emu / g.