Strict molecular sieving over electrodeposited 2D-interspacing-narrowed graphene oxide membranes

Benyu Qi, Xiaofan He, Gaofeng Zeng (), Yichang Pan, Guihua Li, Guojuan Liu, Yanfeng Zhang, Wei Chen and Yuhan Sun ()
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Benyu Qi: Chinese Academy of Sciences
Xiaofan He: Chinese Academy of Sciences
Gaofeng Zeng: Chinese Academy of Sciences
Yichang Pan: Nanjing Tech University
Guihua Li: Chinese Academy of Sciences
Guojuan Liu: Chinese Academy of Sciences
Yanfeng Zhang: Chinese Academy of Sciences
Wei Chen: Chinese Academy of Sciences
Yuhan Sun: Chinese Academy of Sciences

Nature Communications, 2017, vol. 8, issue 1, 1-10

Abstract: Abstract To separate small molecules/species, it’s crucial but still challenging to narrow the 2D-interspacing of graphene oxide (GO) membranes without damaging the membrane. Here the fast deposition of ultrathin, defect-free and robust GO layers is realized on porous stainless steel hollow fibers (PSSHFs) by a facile and practical electrophoresis deposition (ED) method. In this approach, oxygen-containing groups of GO are selectively reduced, leading to a controlled decrease of the 2D channels of stacked GO layers. The resultant ED-GO@PSSHF composite membranes featured a sharp cutoff between C2 (ethane and ethene) and C3 (propane and propene) hydrocarbons and exhibited nearly complete rejections for the smallest alcohol and ion in aqueous solutions. This demonstrates the versatility of GO based membranes for the precise separation of various types of mixtures. At the same time, a robust mechanical strength of the ED-GO@PSSHF membrane is also achieved due to the enhanced interaction at GO/support and GO/GO interfaces.

Date: 2017
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DOI: 10.1038/s41467-017-00990-x

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