一种便捷方法制备表面氨基化的超顺磁Fe3O4纳米粒子

提出了一种简便易行的对磁性纳米粒子表面进行氨基化的方法. 首先使用化学共沉淀法合成了粒径为10 nm左右的Fe3O4纳米粒子, 然后用阿仑膦酸钠对其表面进行修饰, 使其表面具有了功能化的氨基. 利用透射电子显微镜(TEM)、X射线衍射(XRD)、振动样品磁强计(VSM)、动态光散射(DLS)仪、热重分析(TGA)仪、傅里叶变换红外(FT-IR)光谱仪、X射线光电子能谱(XPS)仪等对其进行表征. 结果显示磁性纳米粒子表面被成功地修饰了一层双膦酸分子. 所制备的纳米粒子可在pH=6.3稳定存在4周以上.

A Convenient Method to Synthesize Surface Amino-Coated Superparamagnetic Fe3O4 Nanoparticles

We propose a convenient method to synthesize surface amino-coated magnetic nanoparticles. Fe3O4 nanoparticles with a grain diameter of about 10 nm were synthesized by the chemical co-precipitation of ferrous chloride and ferric chloride. The obtained superparamagnetic nanoparticles were surface-modified with alendronate to introduce an amino group onto their surfaces. The particles were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometry (VSM), dynamic light scattering (DLS), thermogra-vimetric analysis (TGA), Fourier transforminfrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The data showed that alendronate was successfully linked to the SPM nanoparticles. These particles are stable for more than 4 weeks without precipitation at pH= 6.3.