title: Nanoporous two-dimensional MoS2 membranes for fast saline solution purification.
abstract: Finding a membrane with both high permeability and high salt rejection is very important for saline solution purification. Here, we report the performance of molybdenum disulfide (MoS2) membranes with nanoscale pores for saline solution purification via all-atom molecular dynamics simulations. It was found that the nanoporous two-dimensional MoS2 membrane can impede salt ions, while allowing highly efficient permeation of water molecules. By engineering the appropriate sizes of the nanopores within two-dimensional MoS2 membranes, their water permeability can be tens of times as high as that of conventional reverse osmosis membranes, while still maintaining a high salt rejection rate. These remarkable water permeability and salt rejection properties of the nanoporous monolayer MoS2 membranes are attributed to the formation of single chain hydrogen bonds, which link the water molecules within the nanopores and those at the immediate exteriors of the nanopores, causing significant reduction in the resistance of water molecules passing through the nanopores, which are small enough for any salt ions to pass through. Therefore such nanoporous monolayer MoS2 membranes have great potential for saline solution purification.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, and School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China. yaojunhdpu@126.com and Institute of Condensed Matter Physics, and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Jianlong
authors.initials: J
authors.lastname: Kou
authors.affiliation: State Key Laboratory of Heavy Oil Processing, and School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China. yaojunhdpu@126.com.
authors.forename: Jun
authors.initials: J
authors.lastname: Yao
authors.affiliation: Institute of Condensed Matter Physics, and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Wu
authors.affiliation: Institute of Condensed Matter Physics, and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Institute of Condensed Matter Physics, and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Hangjun
authors.initials: H
authors.lastname: Lu
authors.affiliation: Institute of Condensed Matter Physics, and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices, Zhejiang Normal University, Jinhua 321004, China.
authors.forename: Fengmin
authors.initials: F
authors.lastname: Wu
authors.affiliation: Department of Fiber Science and Apparel Design, Cornell University, Ithaca, New York 14853-4401, USA.
authors.forename: Jintu
authors.initials: J
authors.lastname: Fan