▎ 摘　　要

Withincreased water stress, the development of clean water technologiesis an active area of research. Evaporation-based solutions offer theadvantage of low energy consumption, and recently a 10-30 foldenhancement in water evaporation flux has been observed through angstrom-scalegraphene nanopores (Lee, W.-C., et al., ACS Nano 2022, 16(9), 15382). Herein, using moleculardynamics simulations, we examine the suitability of angstrom-scale graphenenanopores in enhancing water evaporation from salt solutions (LiCl,NaCl, and KCl). Cation-pi interactions between ions andthe surface of nanoporous graphene are found to significantly influenceion populations in the nanopore vicinity, leading to varied waterevaporation fluxes from different salt solutions. The highest waterevaporation flux was observed for KCl solutions, followed by NaCland LiCl solutions, with the differences reducing at lower concentrations.Relative to the bare liquid-vapor interface, 4.54 angstrom nanoporesexhibit the highest evaporation flux enhancements ranging from 7 to11, with an enhancement of 10.8 obtained for 0.6 M NaCl solution,which closely resembles seawater compositions. Functionalized nanoporesinduce short-lived water-water hydrogen bonds and reduce surfacetension at the liquid-vapor interface, thereby lowering thefree energy barrier for water evaporation with a negligible effecton the ion hydration dynamics. These findings can aid in developinggreen technologies for desalination and separation processes withlow thermal energy input.