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Mass Transport via In-Plane Nanopores in Graphene Oxide Membranes
Nano Letters ( IF 9.6 ) Pub Date : 2022-06-10 , DOI: 10.1021/acs.nanolett.2c01615 Tobias Foller 1 , Lukas Madauß 2 , Dali Ji 1 , Xiaojun Ren 1 , K Kanishka H De Silva 3 , Tiziana Musso 1 , Masamichi Yoshimura 3 , Henning Lebius 4 , Abdenacer Benyagoub 4 , Priyank V Kumar 5 , Marika Schleberger 2 , Rakesh Joshi 1
Nano Letters ( IF 9.6 ) Pub Date : 2022-06-10 , DOI: 10.1021/acs.nanolett.2c01615 Tobias Foller 1 , Lukas Madauß 2 , Dali Ji 1 , Xiaojun Ren 1 , K Kanishka H De Silva 3 , Tiziana Musso 1 , Masamichi Yoshimura 3 , Henning Lebius 4 , Abdenacer Benyagoub 4 , Priyank V Kumar 5 , Marika Schleberger 2 , Rakesh Joshi 1
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Angstrom-confined solvents in 2D laminates can travel through interlayer spacings, through gaps between adjacent sheets, and via in-plane pores. Among these, experimental access to investigate the mass transport through in-plane pores is lacking. Our experiments allow an understanding of this mass transport via the controlled variation of oxygen functionalities, size and density of in-plane pores in graphene oxide membranes. Contrary to expectations, our transport experiments show that higher in-plane pore densities may not necessarily lead to higher water permeability. We observed that membranes with a high in-plane pore density but a low amount of oxygen functionalities exhibit a complete blockage of water. However, when water–ethanol mixtures with a weaker hydrogen network are used, these membranes show an enhanced permeation. Our combined experimental and computational results suggest that the transport mechanism is governed by the attraction of the solvents toward the pores with functional groups and hindered by the strong hydrogen network of water formed under angstrom confinement.
中文翻译：
通过氧化石墨烯膜中的平面内纳米孔进行质量传递
2D 层压板中的埃限制溶剂可以通过层间间距、通过相邻片材之间的间隙以及通过面内孔。其中，缺乏研究通过面内孔的质量传输的实验途径。我们的实验通过控制氧化石墨烯膜中平面内孔的氧官能度、大小和密度的变化来理解这种质量传递。与预期相反，我们的传输实验表明，较高的面内孔隙密度不一定会导致较高的水渗透率。我们观察到具有高平面内孔密度但低氧官能团的膜表现出完全的水阻塞。然而，当使用具有较弱氢网络的水-乙醇混合物时，这些膜显示出增强的渗透性。
更新日期：2022-06-10
中文翻译：
通过氧化石墨烯膜中的平面内纳米孔进行质量传递
2D 层压板中的埃限制溶剂可以通过层间间距、通过相邻片材之间的间隙以及通过面内孔。其中，缺乏研究通过面内孔的质量传输的实验途径。我们的实验通过控制氧化石墨烯膜中平面内孔的氧官能度、大小和密度的变化来理解这种质量传递。与预期相反，我们的传输实验表明，较高的面内孔隙密度不一定会导致较高的水渗透率。我们观察到具有高平面内孔密度但低氧官能团的膜表现出完全的水阻塞。然而，当使用具有较弱氢网络的水-乙醇混合物时，这些膜显示出增强的渗透性。
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