近日，课题组博士生殷齐康论文“Synergistic Effect of Membrane Configurations and Electric Field Boosts CO₂ Separation in Ti₃C₂O₂/Graphene Lamellar Membranes”被Journal of Membrane Science（2025中科院SCI一区TOP，IF=9.0）接收！

Abstract

Two-dimensional hybrid lamellar membranes for gas separation have garnered significant attention due to theirremarkable structural performance. The CO₂-membrane interaction, as well as the permeation process, is largely influenced by interlayer spacing, where increasing interlayer spacing enhances CO₂ permeance but may compromise CO₂ selectivity.To address this, the potential and effect of two Ti₃C₂O₂/graphene hybrid lamellar membranes, CB-Mem and vdWs-Mem (covalent bonds and van der Waals interactions between monolayers, respectively), for improving CO₂ separation under external electric fields are analyzed using molecular dynamics simulations.The results show that vdWs-Mem and CB-Mem exhibit higher CO₂ permeance and stronger CO₂ adsorption capacity, respectively. Notably, vdWs-Mem shows excellent CO₂ permeance and selectivity. CB-Mem can significantly improve CO₂ permeance to 1.23 × 10^–3 mol/s·m²·Pa under an external electric field of 1.0 × 10^–4 V/Å without sacrificing selectivity. The synergistic effect of CB-Mem and external electric field results in lower energy consumption (0.0281 GJ/ton) for CO₂ separation from biogas, thus reducing application costs. This work highlights the CO₂ separation mechanism of Ti₃C₂O₂/graphene hybrid lamellar membranes under the interlayer spacings and external electric fields, providing a theoretical foundation for the structure design and the industrial applications for CO₂ separation.

https://doi.org/10.1016/j.memsci.2026.125363