新型磁性Fe_3O_4/EDTA复合纳米粒子的制备及性能研究  

Preparation and Properties of Novel Magnetic Fe_3O_4/EDTA Nano-composite Particles

作　　者：姜炜[1] 李凤生[1] 陈令允[1] 杨毅[1] 楚建军 

机构地区：[1]南京理工大学国家特种超细粉体工程技术研究中心,南京210094 [2]无锡肿瘤防治研究所,无锡214062

出　　处：《物理化学学报》2005年第2期182-186,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(50306008);江苏省自然科学基金(BK2003421)资助项目~~

摘　　要：采用氨羧络合剂EDTA对纳米磁性Fe3O4粒子进行表面改性,制备出能够螯合金属离子和放射性核素离子的磁性Fe3O4/EDTA复合纳米粒子.用X射线衍射、红外光谱、透射电子显微镜、光电子能谱、振动样品磁强计和原子吸收光谱对复合粒子进行了表观形貌、结构、磁学及螯合性能表征.结果表明,纳米磁性Fe3O4和EDTA之间能够有效地以化学键合方式进行复合.改性后,Fe3O4/EDTA纳米复合粒子可以对包括放射性金属离子在内的多种金属离子具有良好的络合效果.Fe3O4/EDTA nano-composite particles with capability of chelating general metal ions and radionuclide metal ions were prepared, and characterized by IR, XRD, XPS, TEM, VSM (vibrating sample magnetometer) and AAS (atomic absorption spectrometer). Chelating agent EDTA was used for the surface modification of Fe3O4 magnetic particles with 20 nm in size. The effects of temperature of preparation process on the crystal form and magnetization, and the capability of the Fe3O4/EDTA nano-composite particles to chelate metal ions were investigated. The results showed that (1) the magnetization of the composite particles prepared at 50 similar to 70 degreesC modification condition was equal to that of unmodified Fe3O4 nanometer particles; (2) the stability against oxidization of the Fe3O4/EDTA composite particles was improved owing to the modification of the Fe3O4 particles by EDTA; (3) the composite particles could chelate several general metal ions, such as Cu (I) Ca(II) Mg (II) and Ni (II), due to that the surface of the Fe3O4/EDTA composite particles was possessed of chelating function groups.

关 键 词：复合粒子 磁性 FE3O4 EDTA 络合剂 

分 类 号：TB383[一般工业技术—材料科学与工程]