Water and salt permeability of monolayer graph-n-yne: Molecular dynamics simulations

As new nanoporous materials, graph-n-yne membranes may have several potential applications in water purification and salt rejection. The simulation results from molecular dynamics (MD) method show that graph-n-yne membranes exhibit higher salt rejection and water permeability than conventional reverse osmosis membranes. In high salt concentrations, the salt rejection ratio of graph-4-yne and graph-5-yne declines with the augment of hydrostatic pressure, while water flux across graph-4-yne and graph-5-yne membranes increases. However, hydrostatic pressure does not affect the graph-3-yne membrane on the salt rejection. The negative charged graph-n-yne membrane can improve the water permeability and prevent ions from passing through the membrane.

The simulation results from molecular dynamics method show that graph-n-yne membranes exhibit higher salt rejection and water permeability than conventional reverse osmosis membranes.453