Quasi-vertically asymmetric channels of graphene oxide membrane for ultrafast ion sieving.

ABSTRACT: The high performance of two-dimensional (2D) channel membranes is generally achieved by preparing ultrathin or forming short channels with less tortuous transport through self-assembly of small flakes, demonstrating potential for highly efficient water desalination and purification, gas and ion separation, and organic solvent waste treatment. Here, we report the construction of vertical channels in graphene oxide (GO) membrane based on a substrate template with asymmetric pores. The membranes achieved water permeance of 2647 L m^-2 h^-1 bar^-1 while still maintaining an ultrahigh rejection rate of 99.9% for heavy metal ions, which is superior to the state-of-the-art 2D membranes reported. Furthermore, the membranes exhibited excellent stability during long-ter

SUBMITTER: Han C 

PROVIDER: S-EPMC11762792 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature