School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, China.
Institute of Physical Chemistry and Electrochemistry, Leibniz University of Hannover, Callinstrasse 3A, 30167, Hannover, Germany.
Angew Chem Int Ed Engl. 2017 Feb 6;56(7):1825-1829. doi: 10.1002/anie.201609306. Epub 2017 Jan 10.
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 Ti AlC , delaminated nanosheets of the composition Ti C T with 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 h bar ) 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.
二维（2D）材料是先进的水净化膜的有前途的候选材料。一种新型的层状膜基于堆叠的二维 MXene 纳米片。从紧密堆积的 TiAlC 开始，可以通过蚀刻和超声处理来生产具有官能团 T（O、OH 和/或 F）的组成 TiCT 的剥离纳米片，并通过真空过滤将其固定在多孔支撑体上。负载在阳极氧化铝（AAO）基底上的 MXene 膜对尺寸大于 2.5nm 的分子具有优异的水透过率（超过 1000Lm -1 h -1 bar -1 ）和良好的截留率（超过 90%）。通过 MXene 膜的水透过率远高于具有类似截留率的大多数膜。长时间运行也表明 MXene 膜在水净化方面具有出色的稳定性。
