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Wang, Chen; Liu, Fei‐Fei; Tan, Zheng; Chen, Yu‐Ming; Hu, Wen‐Chao; Xia, Xing‐Hua
Advanced functional materials, 02/2020, Volume: 30, Issue: 9Journal Article
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.
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