Quantized Water Transport: Ideal Desalination through Graphyne-4 Membrane

Chongqin Zhu, Hui Li, Xiao Cheng Zeng, E. G. Wang, Sheng Meng

Research output: Contribution to journalArticle

76 Scopus citations

Abstract

Graphyne sheet exhibits promising potential for nanoscale desalination to achieve both high water permeability and salt rejection rate. Extensive molecular dynamics simulations on pore-size effects suggest that γ-graphyne-4, with 4 acetylene bonds between two adjacent phenyl rings, has the best performance with 100% salt rejection and an unprecedented water permeability, to our knowledge, of ∼13â€...L/cm 2 /day/MPa, 3 orders of magnitude higher than prevailing commercial membranes based on reverse osmosis, and ∼10 times higher than the state-of-the-art nanoporous graphene. Strikingly, water permeability across graphyne exhibits unexpected nonlinear dependence on the pore size. This counter-intuitive behavior is attributed to the quantized nature of water flow at the nanoscale, which has wide implications in controlling nanoscale water transport and designing highly effective membranes.

Original languageEnglish (US)
Article number3163
JournalScientific reports
Volume3
DOIs
StatePublished - Nov 7 2013

ASJC Scopus subject areas

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