title: A Two-Dimensional Lamellar Membrane: MXene Nanosheet Stacks.
abstract: Two-dimensional (2D) materials are promising candidates for advanced water purification membranes. A new kind of lamellar membrane is based on a stack of 2D MXene nanosheets. Starting from compact Ti3AlC2, delaminated nanosheets of the composition Ti3C2Txwith the functional groups T (O, OH, and/or F) can be produced by etching and ultrasonication and stapled on a porous support by vacuum filtration. The MXene membrane supported on anodic aluminum oxide (AAO) substrate shows excellent water permeance (more than 1000 L m-2h-1bar-1) and favorable rejection rate (over 90 %) for molecules with sizes larger than 2.5 nm. The water permeance through the MXene membrane is much higher than that of the most membranes with similar rejections. Long-time operation also reveals the outstanding stability of the MXene membrane for water purification.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, China.
authors.forename: Li
authors.initials: L
authors.lastname: Ding
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, China.
authors.forename: Yanying
authors.initials: Y
authors.lastname: Wei
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, China.
authors.forename: Yanjie
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Chen
authors.affiliation: Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstrasse 3A, 30167, Hannover, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Caro
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, China.
authors.forename: Haihui
authors.initials: H
authors.lastname: Wang
keywords: MXenes; Ti3C2TX; membranes; separation; two-dimensional nanosheets