期刊
NANO LETTERS
卷 15, 期 5, 页码 3254-3260出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b00456
关键词
Molecular sieve; filter; membrane; desalination; reverse osmosis; forward osmosis
类别
资金
- King Fahd University of Petroleum and Minerals in Dhahran, Saudi Arabia, through the Center for Clean Water and Clean Energy at MIT
- KFUPM [R10-CW-09]
- U.S. Department of Energy, Basic Energy Sciences [DE-SC0008059]
- Samsung Fellowship
- Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
- National Science Foundation under NSF [ECS-0335765]
- National Science Foundation under MIT [DMR-0819762]
- U.S. Department of Energy (DOE) [DE-SC0008059] Funding Source: U.S. Department of Energy (DOE)
Monolayer nanoporous graphene represents an ideal membrane for molecular separations, but its practical realization is impeded by leakage through defects in the ultrathin graphene. Here, we report a multiscale leakagesealing process that exploits the nonpolar nature and impermeability of pristine graphene to selectively block defects, resulting in a centimeter-scale membrane that can separate two fluid reservoirs by an atomically thin layer of graphene. After introducing subnanometer pores in graphene, the membrane exhibited rejection of multivalent ions and small molecules and water flux consistent with prior molecular dynamics simulations. The results indicate the feasibility of constructing defect-tolerant monolayer graphene membranes for nanofiltration, desalination, and other separation processes.
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