Fig. 2: Generation of ion-selective pores in graphene membranes and corresponding ion-ion separation performance.
From: Electrochemical-repaired porous graphene membranes for precise ion-ion separation
a Schematic illustration of the strategy for the generation of ion-sieving pores in graphene. Gray and red atoms represent C and O, respectively. b Aberration-corrected high-resolution transmission electron microscopy (AC-HRTEM) image of the pristine-Gr. c AC-HRTEM image of the 5minCO2-Gr. d Pore size distribution from the 5minCO2-Gr where selective and non-selective pores are highlighted in cyan and yellow, respectively. e Ion-ion separation performance comparison between the membranes prepared with different pore generation conditions. f Ion-ion separation performance of the membranes tested using different ions. The error bar is the standard deviation from at least three samples, and the center of each error bar represents the average data from these samples.
