Ion sieving by a two-dimensional Ti₃C₂T_x alginate lamellar membrane with stable interlayer spacing.

ABSTRACT: Two-dimensional membranes attract extensive interest due to the anomalous transport phenomena; however, the ion separation performance is below the theoretical prediction. The stabilization of d-spacing is a key step for enhancing ion selectivity. Here, we demonstrate a strategy for stabilizing the Ti₃C₂T_x laminar architecture by alginate hydrogel pillars. After pillared by Ca-alginate, the nanochannel diameters are effectively fixed at 7.4 ± 0.2 Å, and the membrane presents a permeation cutoff and an outstanding sieving property towards valent cations. When applied for acid recovery, the outstanding H⁺/Fe²⁺ selectivity makes the membrane a promising substitution for traditional ion-exchange membranes. Moreover, the ultrathin Mn-algina

SUBMITTER: Wang J 

PROVIDER: S-EPMC7363915 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature