Interfacial self-assembled GR/GO ultrathin membranes on a large scale for molecular sieving,Journal of Materials Chemistry A

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Interfacial self-assembled GR/GO ultrathin membranes on a large scale for molecular sieving
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-08-11 , DOI: 10.1039/d0ta05337f
Junyuan Xia _{1,

2,

3,

4,

5} , Peng Xiao _{1,

2,

3,

4,

5} , Jincui Gu _{1,

2,

3,

4,

5} , Tianyu Chen _{1,

2,

3,

4,

5} , Chaohui Liu _{6,

7,

8,

9,

10} , Luke Yan _{6,

7,

8,

9,

10} , Tao Chen _{1,

2,

3,

4,

5}

Affiliation

Graphene oxide (GO) has superior molecular sieving abilities due to its unimpeded two-dimensional (2D) nano-channels and nacre-like lamellar structure. However, it remains a huge challenge to fully exploit its unmatched features to construct a GO-based membrane on a large scale for excellent screening performance. Here, we display a facile, ultrafast and environmentally friendly strategy to design an ultrathin (graphene/graphene oxide@polyetherimide) GR/GO@PEI composite membrane under the collective effects of a hydrophilic PEI molecular-bridge and an ordered GR/GO laminar structure. Excitingly, this composite membrane presents extraordinary structural stability, even when transferred to any given substrate, regardless of its chemical components, structure, or specification. Furthermore, this membrane shows high permeance of up to 191 L m⁻² h⁻¹ bar⁻¹ and over 99% rejection of Congo red, far superior to the majority of GO-based separation membranes reported so far. In addition, it can withstand several types of physical damage and chemical corrosion, as well as being further able to realize the purification of actual, complex, multi-component, domestic sewage. This work will open the door to developing scalable 2D lamellar membranes with ultrafast and precise separation channels for practical water purification.

中文翻译：

界面自组装的GR / GO超薄膜，用于分子筛

氧化石墨烯（GO）具有无阻碍的二维（2D）纳米通道和类似珍珠质的层状结构，因此具有出色的分子筛分能力。然而，充分利用其无与伦比的功能来大规模构建基于GO的膜以实现出色的筛选性能仍然是一个巨大的挑战。在这里，我们展示了一种在亲水性PEI分子桥和有序GR / GO层状结构共同作用下设计超薄（石墨烯/氧化石墨烯@聚醚酰亚胺）GR / GO @ PEI复合膜的简便，超快且环保的策略。。令人兴奋的是，这种复合膜即使转移到任何给定的基材上，也无论其化学成分，结构或规格如何，都具有非凡的结构稳定性。此外，该膜表现出高达191 L m的高渗透性⁻² h^-1 bar^-1和超过99％的刚果红截留率，远远优于迄今为止报道的大多数基于GO的分离膜。另外，它可以承受多种类型的物理损坏和化学腐蚀，并且还能够实现对实际的，复杂的，多组分的生活污水的净化。这项工作将为开发具有超快和精确分离通道的可扩展2D层状膜打开大门，以进行实际的水净化。

更新日期：2020-09-22

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