Polyethyleneimine Modified Two-Dimensional GO/MXene Composite Membranes with Enhanced Mg²⁺/Li⁺ Separation Performance for Salt Lake Brine.

ABSTRACT: As global demand for renewable energy and electric vehicles increases, the need for lithium has surged significantly. Extracting lithium from salt lake brine has become a cutting-edge technology in lithium resource production. In this study, two-dimensional (2D) GO/MXene composite membranes were fabricated using pressure-assisted filtration with a polyethyleneimine (PEI) coating, resulting in positively charged PEI-GO/MXene membranes. These innovative membranes, taking advantage of the synergistic effects of interlayer channel sieving and the Donnan effect, demonstrated excellent performance in Mg²⁺/Li⁺ separation with a mass ratio of 20 (Mg²⁺ rejection = 85.3%, Li⁺ rejection = 16.7%, S_Li,Mg = 5.7) in simulated saline lake brine. Testi

SUBMITTER: Wang J 

PROVIDER: S-EPMC11433666 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature