Highly Stable and Antibacterial Two‐Dimensional Tungsten Disulfide Lamellar Membrane for Water Filtration

Two‐dimensional (2D) lamellar membranes consisting of restacked WS 2 nanosheets have shown excellent separation properties for water filtration. The stability, antifouling properties, and antibacterial activities of the WS 2 laminar membranes were investigated for practical application. We discovered that the separation properties of the WS 2 laminar membranes changed slightly after soaking in water for 28 days as well as that of a 45 h‐cross‐flow filtration, demonstrating an extraordinary operational stability of the WS 2 laminar membranes. The remarkable stability is related to the dominant van der Waals interactions between WS 2 nanosheets. In addition, the WS 2 laminar membranes exhibited excellent antibacterial properties against S. aureus and E. coli with antibacterial rates of 91.3 % and 89.7 %, respectively. These properties of the WS 2 laminar membranes make them promising candidates for application in water filtration.