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Two-Dimensional Cationic Networks and Their Spherical Curvature with Tunable Opening?Closing
writer:Lingling Zhang, Liping Huang, Shanshan Wu, Xin Xu, Hongbing Ji*, Zhegang Huang*
keywords:capsule-like pocket, curvature of 2D laminas, asymmetric interaction, adsorption of anionic pollutants
source:期刊
specific source:Nano Lett.
Issue time:2019年

Despite many cationic nanomaterials that have been developed for efficient adsorption of anionic pollutants, tailoring a stable shape with denser cations on the surface for advanced removal capability remains challenging. Here, a new strategy is presented for fabricating two-dimensional (2D) cationic laminas and their curvature based on cross-linking of 2D supramolecular networks from hydrogen-bonded trimesic amide derivatives. Owing to the distribution of most cations on the surface, two cationic nanostructures from cross-linking of supramolecular networks show fast sorption kinetics for anionic pollutants. Notably, the removal capacity of the capsule-like curvature adsorbent is more than twice that of lamina adsorbent for sufficient space around cationic sites in hollow aperture. Moreover, the capsule-like adsorbent is triggered to open and spontaneously release the adsorbed pollutants upon the addition of halogen anions, which can be recovered by subsequent dialysis. Strategy of a capsule-like pocket with tunable opening-closing will provide a new insight for storage and adsorption.