氧化石墨烯分离膜孔道调控研究进展

Progress in pore modulation of graphene oxide separation membranes

膜分离法以其独特的优势在气体分离中占重要地位。氧化石墨烯(GO)膜具有层间距分布窄、物化稳定性高的特点,非常适用于气体分离。但GO膜层间距难以控制,无法精确分离亚纳米级气体分子。对GO膜进行改性可以优化薄膜对气体分子的筛分作用。对GO膜层间通道的调控进展进行综述,包括热还原法、分子交联以及插层纳米粒子等途径,并介绍了GO/金属有机框架复合材料研究进展。

Membrane separation plays a crucial role in gas separation due to its unique advantages.Graphene oxide membranes with narrow interlayer spacing distribution and high physicochemical stability are highly suitable for gas separation.However,it is challenging to control the interlayer spacing of graphene oxide membranes,which limits their ability to precisely separate sub-nanometer gas molecules.Modification of graphene oxide membranes can optimize their sieving capability for gas molecules.This review summarizes the progress in regulating the interlayer channels of graphene oxide membranes,including methods such as thermal reduction,molecular cross-linking,and intercalated nanoparticles.The research progress of graphene oxide/metal-organic framework composite materials is also introduced.