Polymer membranes typically possess a broad pore-size distribution that leads to much lower selectivity in ion separation when compared to membranes made of crystalline porous materials; however, they are highly desirable because of their easy processability and low cost. Herein, we demonstrate the fabrication of ion-sieving membranes based on a polycarbazole-type conjugated microporous polymer using an easy to scale-up electropolymerization strategy. The membranes exhibited high uniform sub-nanometer pores and a precisely tunable membrane thickness, yielding a high ion-sieving performance with a sub-1 Å size precision. Both experimental results and molecular simulations suggested that the impressive ion-sieving performance of the CMP membranes originates from their uniform and narrow pore-size distribution.
Bibliographical noteKAUST Repository Item: Exported on 2021-07-01
Acknowledgements: The project was supported by King Abdullah University of Science and Technology under the competitive research grant URF/1/3769-01.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Materials Science(all)