利用氧化石墨烯复合膜吸附去除水中重金属离子的研究进展

氧化石墨烯作为一种独特的碳纳米材料,具有很高的比表面积,且其表面含有丰富的羟基、羧基等含氧基团,被认为是一种得天独厚的吸附材料,在净化水体方面有着广阔的发展前景。目前,为进一步提高氧化石墨烯对重金属离子的选择吸附性,氧化石墨烯被辅之以其他功能化材料,来制备复合材料。此外,膜分离技术在解决水环境问题上效果显著,因此将氧化石墨烯复合材料与膜分离技术相结合,来制备氧化石墨烯复合膜,对净化水体起到了事半功倍的效果。本文综述了氧化石墨烯复合膜材料的制备方法,并对其去除水中重金属离子的研究进展与吸附机理进行了综述,也对后续研究方向进行了展望。

A Review on Heavy Metal Ions Adsorption from Water by Graphene Oxide Composite Membranes

As a kind of unique carbon nanomaterials, graphene oxide has a very high specific surface area and it is rich in oxygen containing groups such as hydroxyl, carboxyl, which was considered to be a kind of excellent adsorption material. Thus, it has a wide prospect in the application of water purification. At present, in order to enhance the selective adsorption of the heavy metal ions, graphene oxide has been functionalized with other functional materials to prepare composite materials. In addition, the tech-nology of membrane separation in solving the problem of water environment is highly used. Therefore, the graphene oxide composite membrane combined with the technology of membrane separation has an excellent behavior in water purify research.In this review, we discuss the preparation of graphene oxide and its composite membrane materials. Furthermore, the removal of heavy metal ions in water and adsorption mechanism are reviewed. Ultimately, we look forward into later researches.