海水淡化
膜
纳米孔
材料科学
渗透
化学工程
二硫化钼
水运
石墨烯
多孔性
金属有机骨架
纳米技术
环境工程
化学
水流
吸附
环境科学
复合材料
有机化学
工程类
生物化学
作者
Zhonglin Cao,Vincent Liu,Amir Barati Farimani
出处
期刊:Nano Letters
[American Chemical Society]
日期:2019-10-31
卷期号:19 (12): 8638-8643
被引量:119
标识
DOI:10.1021/acs.nanolett.9b03225
摘要
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 near the pore. Water desalination performance of MOF offers a potential solution for energy-efficient water desalination.
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