title: Stability, Molecular Sieving, and Ion Diffusion Selectivity of a Lamellar Membrane from Two-Dimensional Molybdenum Disulfide.
abstract: Two-dimensional (2D) subnanometer channels allow unique mass transport promising for molecular sieving. New 2D channels of MoS2nanosheets allow one to understand molecular transmission and separation, unlike the graphene oxide counterpart containing various defects and cationic metal contaminants. Membranes from layered MoS2platelets show extraordinary stability in an aqueous environment and compatibility with polymer filters, both beneficial to efficient manufacturing. Sharing gas-tightness and unimpeded water vapor permeation with a graphene oxide membrane, our lamellar MoS2membrane demonstrates a molecular sieving property for organic vapor for the first time. The MoS2membrane also reveals diffusion selectivity of aqueous ions, attributable to the energy penalty in bulk-to-2D dimensional transition. These newly revealed properties of the lamellar membrane full of angstrom-sized 2D channels point to membrane technology applications for energy and environment.
authors.affiliation: Nanoscience for Energy Technology and Sustainability, Department of Mechanical and Process Engineering, Eidgenössische Technische Hochschule (ETH) Zürich , Tannenstrasse 3, CH-8092 Zürich, Switzerland.
authors.forename: Mengmeng
authors.initials: M
authors.lastname: Deng
authors.affiliation: Advanced Materials Simulations Group, Graduate School of Energy, Environment, Water, and Sustainability, Korea Advanced Institute of Science and Technology , 34051 Daejeon, Korea.
authors.forename: Kijeong
authors.initials: K
authors.lastname: Kwac
authors.affiliation: Nanoscience for Energy Technology and Sustainability, Department of Mechanical and Process Engineering, Eidgenössische Technische Hochschule (ETH) Zürich , Tannenstrasse 3, CH-8092 Zürich, Switzerland.
authors.forename: Meng
authors.initials: M
authors.lastname: Li
authors.affiliation: Advanced Materials Simulations Group, Graduate School of Energy, Environment, Water, and Sustainability, Korea Advanced Institute of Science and Technology , 34051 Daejeon, Korea.
authors.forename: Yousung
authors.identifier: 0000-0003-2615-8394
authors.initials: Y
authors.lastname: Jung
authors.affiliation: Nanoscience for Energy Technology and Sustainability, Department of Mechanical and Process Engineering, Eidgenössische Technische Hochschule (ETH) Zürich , Tannenstrasse 3, CH-8092 Zürich, Switzerland.
authors.forename: Hyung Gyu
authors.identifier: 0000-0001-8121-2344
authors.initials: HG
authors.lastname: Park
keywords: 2D channel; 2D material; molecular sieving; molybdenum disulfide; stability