ABSTRACT

Fabrication of nanoporous membranes from two-dimensional nanomaterial has recently gained increased research interest because of their flexibility, freestanding film formability, selectivity, and ability to withstand the applied transmembrane pressure. Among various 2D materials, graphene and its derivatives are widely employed for the preparation of next-generation membranes due to their excellent separation properties with inherent qualities like atomic thickness, good tensile strength, and frictionless surface for real-time applications. This review discusses the recent progress in three types of porous graphene-based materials, which are holey graphene, graphene nanomesh and graphene oxide laminates, and their applicability for membrane separations. This review aims to summarize the preparation and properties of these membranes for water purification application. The various factors which influence the separation efficiency of the graphene-derived membranes such as mechanical stability, effect of surface architecture, effect of interlayer spacing, and various crosslinking strategies are also discussed.

摘要

由于其柔性，独立的膜可成形性，选择性和承受跨膜压力的能力，由二维纳米材料制造纳米多孔膜近来引起了越来越多的研究兴趣。在各种2D材料中，石墨烯及其衍生物被广泛用于下一代膜的制备，因为它们具有优异的分离性能以及固有的质量，例如原子厚度，良好的拉伸强度和实时应用的无摩擦表面。这篇综述讨论了三种多孔石墨烯基材料的最新进展，它们是多孔石墨烯，石墨烯纳米网和氧化石墨烯层压板，以及它们在膜分离中的适用性。这篇综述旨在总结用于水净化应用的这些膜的制备和性能。还讨论了影响石墨烯衍生膜的分离效率的各种因素，例如机械稳定性，表面结构的影响，层间间距的影响以及各种交联策略。