络合剂DTPA对纳米磁性Fe_3O_4粒子的表面改性研究  

Study on Surface Modification of Magnetic Fe_3O_4 Nano-Particles by Chelator DTPA

作　　者：姜炜[1] 杨毅[1] 李凤生[1] 

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

出　　处：《微纳电子技术》2006年第12期577-581,共5页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(50602024)

摘　　要：采用表面化学修饰法由络合剂DTPA对纳米磁性Fe3O4粒子进行表面化学修饰改性,制备出具有表面螯合性能的纳米磁性Fe3O4/DTPA复合粒子。用多种分析手段对复合粒子进行了性能表征。结果表明,螯合剂DTPA对纳米磁性Fe3O4粒子进行了有效的表面修饰,通过化学键合牢固地结合在粒子表面,不仅提高了粒子的抗氧化性和耐候性,而且使该复合粒子对多种金属粒子具有螯合性能。The novel magnetic Fe3O4/DTPA composite nano-particles which can be effectively composited with metal ions were prepared from Fe3O4 and DTPA. The as-prepared composite nano-particles were characterized by some techniques. The results show that DTPA is coupled on the surface of Fe3O4 particles via chemical bonds which can effectively enhance the stability of Fe3O4 against oxidization. The as-prepared magnetic Fe3O4DTPA composite nano-particles present prominent chelation property with metal ions.

关 键 词：纳米 Fe3O4/DTPA复合粒子 磁性 络合剂 

分 类 号：O61[理学—无机化学] R73[理学—化学]