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[JMCA] Interfacial Self-assembled GR/GO Ultrathin Membranes in Large Scale for Molecular Sieving
作者:Junyuan Xia, Peng Xiao, Jincui Gu,* Tianyu Chen, Chaohui Liu, Luke Yan,* Tao Chen*
關鍵字:GR/GO, separation membranes
論文來源:期刊
具體來源:JMCA, 2020, 8, 18735
發表時間:2020年

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


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