Two-Dimensional Cationic Networks and Their Spherical Curvature with Tunable Opening?Closing
作者：Lingling Zhang, Liping Huang, Shanshan Wu, Xin Xu, Hongbing Ji*, Zhegang Huang*
關鍵字：capsule-like pocket, curvature of 2D laminas, asymmetric interaction, adsorption of anionic pollutants
論文來源：期刊
具體來源：Nano Lett.
發表時間：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.