Water Desalination with Two-Dimensional Metal-Organic Framework Membranes.

Published on Oct 31, 2019in Nano Letters11.189
· DOI :10.1021/ACS.NANOLETT.9B03225
Zhonglin Cao4
Estimated H-index: 4
(CMU: Carnegie Mellon University),
Vincent Liu2
Estimated H-index: 2
(CMU: Carnegie Mellon University),
Amir Barati Farimani19
Estimated H-index: 19
(CMU: Carnegie Mellon University)
Providing fresh and drinkable water is a grand challenge the world is facing today. Development in nanomaterials can create possibilities of using energy-efficient nanoporous materials for water desalination. In this work, we demonstrated that ultrathin conductive metal–organic framework (MOF) is capable of efficiently rejecting ions while giving access to high water flux. Through molecular dynamic simulation, we discovered perfect ion rejection rate by two-dimensional (2D) multilayer MOF. The naturally porous structure of 2D MOF enables significantly 3–6 orders of magnitude higher water permeation compared to that of traditional membranes. Few layers MOF membranes show 1 order of magnitude higher water flux compared to that of single-layer nanoporous graphene or molybdenum disulfide (MoS2) without the requirement of drilling pores. The excellent performance of 2D MOF membranes is supported by water permeation calculations, water density/velocity profiles at the pore, and the water interfacial diffusion n...
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