Fig. 4: The friction-differentiated alkali ions separation via the zigzag channel in the membrane based on m-KN and GO nacre-like structure. | Nature Communications

Fig. 4: The friction-differentiated alkali ions separation via the zigzag channel in the membrane based on m-KN and GO nacre-like structure.

From: Friction-differentiated separation of alkali ions through two-dimensional nanochannels based on niobate perovskite

Fig. 4: The friction-differentiated alkali ions separation via the zigzag channel in the membrane based on m-KN and GO nacre-like structure.The alternative text for this image may have been generated using AI.

a Trajectories and interfacial friction of Li+, Na+, and K+ transport via the zigzag channel in KN-GO membrane. Source data are provided in Supplementary Data 11–13. b Interfacial friction of Li+, K+ and Na+ transport via the zigzag channel in m-KN membrane. The absence of a sudden force change in the initial stage of the force-displacement curve suggests that dehydration at the channel entrance is not the dominant barrier. Source data are provided as a Source Data file. c Cross-section view of KN-GO membrane in a mass of 3:1 in ACTEM showing layer-by-layer assembly of m-KN and graphene oxide (GO); representative of three independent regions (scalebar: 2 nm); representative of three independent regions d Li+/K+ permselectivity via KN-GO membrane depending on the mass ratio of m-KN to GO. Source data are provided as a Source Data file. e Cation permeation via 1 μm thick KN-GO membrane in a mass ratio of 3:1 supported by microporous Nylon. Inset: the relationship between the alkali ions permeation rate obtained in experiment and the maximum interfacial friction in zigzag channel of KN-GO membrane in a mass ratio of 3:1. Source data are provided as a Source Data file. f XRD of KN-GO membranes in a mass ratio of 3:1 after the permeation test of alkali ions. Source data are provided as a Source Data file.

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