膜
纳米孔
共价键
材料科学
纳米结构
纳米技术
纳米尺度
生物分子
蜂巢
化学
有机化学
复合材料
生物化学
作者
Ayan Yao,Hao Chen,Qian Sun,Linghao Liu,Ziye Song,Wen He,Jiangtao Liu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-11-14
卷期号:17 (22): 22916-22927
被引量:5
标识
DOI:10.1021/acsnano.3c08028
摘要
Membranes with precisely defined nanostructure are desirable for energy-efficient molecular separations. The emergence of membranes with honeycomb lattice or topological nanopores is of fundamental importance. The tailor-made nanostructure and morphology may have huge potential to resolve the longstanding bottlenecks in membrane science and technology. Herein, inspired by honeycomb architecture, we demonstrate an effective and scalable route based on interfacial polymerization (IP) to generate flexible and ordered covalent organic network (CON) membranes for liquid-phase molecular separations. The aperture size of a CON membrane can be reasonably designed through the strong covalent bond between molecular building blocks. The fabricated CON membrane formed by IP showed an obviously size-dependent sieving of molecules, yielding a stepwise conversion from low rejection to the expected high rejection. Moreover, the CON membrane was also found to have the sieving capability for tetracycline and ciprofloxacin, ascribed to the effect of size exclusion by an ordered single-nanoscale channel (<1 nm). This approach provides a viable strategy for creating target-sized channels from molecular-level design and demonstrates their potential for accurate molecular separations.
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