中文摘要：

四氧化三铁（Fe3O4）这一用途广泛的功能性磁性纳米粒子,但是由于在制备过程中,其形貌难以控制,团聚严重,大大限制了它的应用.用环境友好的植酸钠（IP6）胶束为模板,利用分子中六个不共面的磷酸酯键,络合铁离子,水解制备了Fe3O4/IP6纳米结构,其有分散性好,长期稳定的特点.Fe3O4/IP6中磷酸酯键可捕获富集水体中Cr（VI）离子,利用Fe3O4的磁性,通过外磁场将Cr（VI）离子从废水中分离出来.实验结果表明：该过程时间短（10 min）,效果理想.还观察了水体p H值变化对Fe3O4/IP6纳米粒子分离Cr（VI）的影响.

英文摘要：

The preparation of functional ferroferric oxide （ Fe3O4 ） magnetic nanoparticles is widely concerned. However, during their preparation, it is difficult to control the morphology of Fe3O4 nanoparticles and also a serious agglomeration exists, greatly re- stricting their applications. In present paper,an economical and ＇green＇ reagent-phytic acid （IP6） can form micelle in the water and then the nanoparticles can grow in a soft template. The as-prepared Fe3 O4/IP6 exhibited a good stability and high dispersion. Fe3O4/IP6 can chelate with Cr （VI） due to its phosphate structure. The Fe3O4/IP6 chelated with Cr （VI） can be removed con- veniently from water using an external magnet. Fe3O4/IP6 nanocomposites have a good adsorption capacity to Cr （VI） within a short time （10 min）. Additionally, the effect of pH on adsorption efficiency was studied.