Magnetic Zr-MOFs nanocomposites for rapid removal of heavy metal ions and dyes from water
Magnetic Zr-MOFs nanocomposites for rapid removal of heavy metal ions and dyes from water
复制标题
磁性 Zr-MOFs 纳米复合材料可快速去除水中的重金属离子和染料
DOI：
10.1016/j.chemosphere.2018.02.019
复制
发表时间：
2018-05-01
期刊：
影响因子：
8.8
通讯作者：
Hu, Bin
中科院分区：
文献类型：
--
作者：
Huang, Lijin;He, Man;Hu, Bin
采用一种简单有效的方法制备了氨基修饰的锆基磁性金属有机骨架复合材料。通过原位生长的方法，在纳米Fe3O4@SiO2核（约15 nm）上包覆Zr-MOFs壳（约5 nm）。采用不同的前驱体，成功制备了Fe3O4@SiO2@UiO-66及其氨基衍生物（Fe3O4@SiO2@UiO-66-NH 2和Fe3O4@SiO2@UiO-66-Urea）。实验结果表明，所制备的Zr-MFC具有较高的吸附容量和较快的吸附动力学，是一种高效的吸附剂。结果发现，胺修饰的MFC是非常有效的金属离子/染料去除相比，原料MFC-O。其中，MFC-N对Pb 2+和亚甲基蓝的吸附容量最大，分别为102 mg g（-1）和128 mg g（-1），而MFC-O对甲基橙子的吸附容量最大，为219 mg g（-1）。此外，以Zr-MFC为吸附剂，通过调节溶液pH值，可以选择性地分离去除混合溶液中的阴、阳离子染料。这些Zr-MFCs材料可以通过合适的洗脱剂从吸附剂上脱附金属离子/有机染料而容易地再生，并且在6次循环后吸附容量保持不变。结果表明，所制备的MFC作为水处理吸附剂具有很大的应用潜力。(C)2018爱思唯尔有限公司版权所有。
Amino-decorated Zr-based magnetic Metal-Organic Frameworks composites (Zr-MFCs) were prepared by a facile and efficient strategy. The nano-sized Fe3O4@SiO2 core (about 15 nm) was coated with a shell of Zr-MOFs (about 5 nm) by means of in-situ growth. And, Fe3O4@SiO2@UiO-66 and its amino derivatives (Fe3O4@SiO2@UiO-66-NH2 and Fe3O4@SiO2@UiO-66-Urea) were successfully prepared by using different precursors. The obtained Zr-MFCs were demonstrated to be efficient adsorbents for metal ions/organic dyes removal from aqueous solution, with high adsorption capacity and fast adsorption kinetics. It was found that the amine-decorated MFCs were highly efficient for metal ions/dyes removal compared to raw MFC-O. Among them, MFC-N exhibited the highest capacity for Pb2+ (102 mg g(-1)) and methylene blue (128 mg g(-1)), while MFC-O exhibited the highest capacity for methyl orange (219 mg g(-1)). Moreover, anionic and cationic dyes could be selectively separated and removed from the mixed solution just by adjusting the solution pH with Zr-MFCs as the adsorbents. And these Zr-MFCs materials can be easily regenerated by desorbing metal ions/organic dyes from the sorbents with appropriate eluents, and the adsorption capacity can be remained unchanged after 6 recycles. The obtained results demonstrated the great application potential of the prepared MFCs as fascinating adsorbents for water treatment. (C) 2018 Elsevier Ltd. All rights reserved.