Zhen Yao, Nikolaus Meyerbröker, Yubo Qi, Julian Cremer, Michael Westphal, Dario Anselmetti, Yang Yang* and Armin Gölzhäuser*,
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引用次数: 0
摘要
纳米多孔碳纳米膜(CNMs)由自组装单层形成,理想地结合了高水通量和精确的离子选择性,用于分子分离和海水淡化。然而,它们的实际实施经常受到大型外延衬底的可用性的挑战,限制了膜的扩展。在这里,我们报道了一种在SiO2/Si晶片上自旋涂覆聚(4-乙烯基联苯)(PVBP)的CNMs的可扩展合成。电子照射无定形PVBP分子层可形成厚度为15 nm的连续膜和高密度的亚纳米孔,其透水性高达530 L m-2 h-1 bar-1,同时可排斥尺寸大于1 nm的离子和分子。进一步引入增强多孔嵌段共聚物层,可以制造厘米级CNM复合材料,有效地将有机染料从水中分离出来。这些结果为大规模制备纳米膜提供了一条可行的途径。
Scalable Synthesis of Carbon Nanomembranes from Amorphous Molecular Layers
Nanoporous carbon nanomembranes (CNMs) created by self-assembled monolayers ideally combine a high water flux and precise ion selectivity for molecular separation and water desalination. However, their practical implementation is often challenged by the availability of large epitaxial substrates, limiting the membrane up-scaling. Here, we report a scalable synthesis of CNMs from poly(4-vinylbiphenyl) (PVBP) spin-coated on SiO2/Si wafers. Electron irradiation of the amorphous PVBP molecular layers induces the formation of a continuous membrane with a thickness of 15 nm and a high density of subnanometer pores, providing a water permeance as high as 530 L m–2 h–1 bar–1, while repelling ions and molecules larger than 1 nm in size. A further introduction of a reinforced porous block copolymer layer enables the fabrication of centimeter-scale CNM composites that efficiently separate organic dyes from water. These results suggest a feasible route for large-scale nanomembrane fabrication.
期刊介绍:
ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.