| 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pH值变化对 Fe3O4/IP6纳米粒子分离Cr(VI)的影响. |
| 关键词: 四氧化三铁 植酸 六价铬 |
| DOI： |
| 分类号: |
| 基金项目:上海师范大学大学生创新实验项目(B-9117-13-007061);国家自然科学面上基金项目(21073121) |
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| Removal of Cr(VI)in water by Fe3O4/IP6 |
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CHEN Lu, FU Shuyue, LING Bo, JIANG Xiayan, ZHANG Xueru, WANG Shuang, YANG Haifeng
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College of Life and Environmental Sciences,Shanghai Normal University
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| Abstract: |
| 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 restricting 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 Fe3O4/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 conveniently 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. |
| Key words: ferroferric oxide phytic acid Cr(VI) |
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