磁性金属有机框架材料制备及吸附性能研究

利用简单的溶剂热法合成了MIL-101（Fe）/CoFe₂O₄和MIL-101（Fe）/NiFe₂O₄磁性金属有机框架纳米复合材料。通过X射线衍射仪（XRD）、扫描电子显微镜（SEM）、振动磁强计（VSM）、热重分析仪（TGA）和紫外可见分光光度计（UV）等对复合材料的相结构、形貌、磁性能和吸附性能进行了研究。将磁性金属有机框架材料用于吸附污水中罗丹明B（RhB）,研究了罗丹明B初始质量浓度对复合材料吸附能力的影响。结果表明,制备的磁性金属有机框架复合材料的形貌均匀、结晶度高,具有高的饱和磁化强度。复合物具有金属有机框架材料和磁性材料的双重优点。MIL-101（Fe）/CoFe₂O₄对罗丹明B有较高的吸附能力（97.3 mg/g）。热力学研究发现吸附等温方程符合Langmuir模型,吸附动力学研究表明吸附机制与吸附质和吸附剂有关。磁性金属有机框架纳米复合材料作为污水处理剂将具有广阔的应用前景。

Stduy on preparation of magnetic metal-organic frame materials and their adsorption properties

Magnetic MIL-101（Fe）/CoFe₂O₄ and MIL-101（Fe）/NiFe₂O₄ composites were synthesized by a simple solvothermal method.The composite phase structure,morphology,magnetic properties and adsorption properties were investigated by X-Ray diffractometer（XRD）,scanning electron microscope（SEM）,vibrating magnetometer（VSM）,thermal gravimetric analyzerand（TGA） and UV-vis spectrophotometer（UV）,etc.The magnetic metal organic framework was used to adsorb Rhodamine B,and the effect of initial concentration on the adsorption capacity of Rhodamine B was studied.The results showed that the prepared magnetic metal matrix composites had uniform morphology,high crystallinity and high saturation magnetization.The composite had the double advantage of metal-organic skeleton material and magnetic material.MIL-101（Fe）/CoFe₂O₄ had higher adsorption capacity to Rhodamine B（97.3 mg/g）.Thermodynamic study showed that the adsorption isotherm equation accorded with Langmuir model,and the adsorption kinetics study showed that the adsorption mechanism was related to the adsorbates and adsorbents.Magnetic metal-organic framework nanocomposites would have broad application prospects as sewage treatment agents.