Abstract
We propose a dragging nano-structured suction system based on graphene sheets for water desalination processes.
Highlights
Simulations mimicking the desalination processes have been employed to model desalination using graphene and carbon nanotube membranes, and high-pressure gradients, mimicking reverse osmosis processes.[8,12,13]
We employ the molecular dynamics methodology to simulate the process of desalination using a nanostructured system based on membranes made of graphene walls containing surface pores
During the transfer of water molecules to the chamber, there is a continuous formation/breaking of hydrogen bonds between the two uids at the membrane pore, as can be seen in the movie of the desalination process provided in the Electronic supplementary information (ESI).† The studied systems contain saline solutions of sodium and chlorine with average concentrations close to that present in the seawater (z35 g LÀ1), corresponding to z51 water molecules for each Na–Cl ion pair
Summary
Molecular simulations are a useful tool to examine molecular-level properties at aqueous interfaces.[8,9,10,11] Simulations mimicking the desalination processes have been employed to model desalination using graphene and carbon nanotube membranes, and high-pressure gradients, mimicking reverse osmosis processes.[8,12,13] Striolo and collaborators have employed graphene membranes to study the free energy barrier to cross graphene membranes through pores in pristine graphene, and they found that pores with effective diameters z0.5 nm effectively block dissolved ions. Over a range of plunger speeds, the nano-syringe can achieve desalination ux rates on the order of those obtained via pressurize-driven ows, but with low-energy consumption
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