Fabrication of Bio‐Inspired 2D MOFs/PAA Hybrid Membrane for Asymmetric Ion Transport

Biological ion channels are known as membrane proteins which can turn on and off under environmental stimulus to regulate ion transport and energy conversion. Rapid progress made in biological ion channels provides inspiration for developing artificial nanochannels to mimic the structures and functi...

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Bibliographic Details
Published in:Advanced functional materials 2020-02, Vol.30 (9), p.n/a
Main Authors: Wang, Chen, Liu, Fei‐Fei, Tan, Zheng, Chen, Yu‐Ming, Hu, Wen‐Chao, Xia, Xing‐Hua
Format: Article
Language:English
Subjects:
2D MOFs
Aluminum
asymmetric hybrid membrane
Asymmetry
Chemical composition
Competitive materials
Desalination
energy conversation
Energy conversion
Fluidics
Ion channels
ion current rectification
Ion currents
ion selectivity
Ion transport
Ions
Materials science
Membranes
Metal-organic frameworks
Nanochannels
Nanofluids
Organic chemistry
Selectivity
Surface charge
Transportation systems
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Summary:Biological ion channels are known as membrane proteins which can turn on and off under environmental stimulus to regulate ion transport and energy conversion. Rapid progress made in biological ion channels provides inspiration for developing artificial nanochannels to mimic the structures and functions of ion transport systems and energy conversion in biological ion channels. Due to the advantages of abundant pore channels, metal–organic frameworks (MOFs) have become competitive materials to control the nanofluidic transport. Herein, a facile in situ synthesis method is developed to prepare hybrid nanochannels constructed by 2D MOFs and porous anodic aluminum (PAA). The introduction of asymmetries in the chemical composition and surface charge properties gives the hybrid outstanding ion current rectification properties and excellent ion selectivity. A power density of 1.6 W m−2 is achieved by integrating it into a salinity‐gradient‐driven device. With advantages of facile fabrication method and high ion selectivity, the prepared 2D MOFs/PAA hybrid membrane offers a promising candidate for power conversion and water desalination. A 2D metal–organic frameworks/porous anodic aluminum (MOFs/PAA) hybrid membrane is fabricated with a facile strategy via in situ growth of 2D MOFs on a nanoporous PAA membrane. The as‐prepared hybrid nanochannel presents obvious ionic rectification properties and excellent ion selectivity, which can be used for manipulating ion transport and efficient salinity‐gradient energy conversion.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201908804