Computational Assessment of Water Desalination Performance of Multi-Walled Carbon Nanotubes - Université de Rennes Access content directly
Journal Articles Advanced Theory and Simulations Year : 2020

Computational Assessment of Water Desalination Performance of Multi-Walled Carbon Nanotubes

Abstract

The desalination performance (water permeability and salt rejection) of both uncharged and charged multi-walled carbon nanotubes (MWCNTs) is computationally assessed by means of pressure-driven molecular dynamics simulations. It is shown that the performance of these materials surpass that of the widely used polyamide reverse osmosis membranes and are even better than 2D materials such as nanoporous graphene or boron nitride. The molecular origin of the fast water transport through MWCNT materials is ascribed to a synergic effect between the existence of a single water layer and low friction between water molecules and the carbon nanotube surface. Furthermore, for charged MWCNTs it is highlighted that the electrical charges on the nanotube surface result in a strong anchoring of ions and water molecules. This leads to clogging of the annular region between nanotubes and the generation of a force, which makes water transport through the central channel of the MWCNT faster.
No file

Dates and versions

hal-02531083 , version 1 (03-04-2020)

Identifiers

Cite

Aziz Ghoufi, Anthony Szymczyk. Computational Assessment of Water Desalination Performance of Multi-Walled Carbon Nanotubes. Advanced Theory and Simulations, 2020, 3 (4), pp.1900254. ⟨10.1002/adts.201900254⟩. ⟨hal-02531083⟩
48 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More