磁性石墨烯基纳米材料吸附水中污染物的研究进展

Research Progress on Adsorption of Pollutants in water by Magnetic Graphene-based Nanomaterials

石墨烯基纳米材料(GNs)具有独特的物理化学性质,是优异的吸附材料,但吸附过程中易团聚、吸附完成后难分离等问题限制了其应用。磁性石墨烯基纳米材料(MGNs)不仅结合了GNs的优良吸附能力和磁性材料易于分离的特性,还解决了GNs易团聚和重新堆积的问题,在水处理领域有广阔的应用前景。介绍了MGNs的常用合成方法,着重阐述了在去除废水中难降解污染物等水处理领域中的应用,归纳总结了MGNs去除水中污染物的机理,并对MGNs在水处理领域中的应用前景进行展望,指出了未来研究应优化合成方法以降低MGNs的成本,并探索该纳米材料在实际废水处理中的应用。

In the recent years, graphene-based nanomaterials(GNs) are good candidates of effective adsorbents in water treatment because of their unique physical and chemical properties. However, they usually suffer from serious agglomeration during utilization and difficulties in recycling after adsorption, which limits their application. Thus, the magnetic material is loaded on the GNs to obtain magnetic graphene-based nanomaterials(MGNs). MGNs not only combine the excellent adsorption capacity of GNs and easy separation property of magnetic material, but also avoid or decrease the possibility of agglomeration and restacking. MGNs can easy to separate from the treated water using an external magnet. This review concludes the synthesis of MGNs, highlights adsorption ability for pollutants in water. Then, their mechanisms involving the interaction of MGNs and pollutants are briefly discussed. Finally, prospect for future developments of MGNs in water treatment is proposed. Therefore, MGNs as an excellent adsorbent has bright prospects for application in water treatment.