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High-flux, antibacterial composite membranes via polydopamine-assisted PEI-TiO2/Ag modification for dye removal

Tijdschriftbijdrage - Tijdschriftartikel

© 2019 Elsevier B.V. The use of engineered nanomaterials in membrane design has proved promising to enhance the membrane separation performance and confer additional specific functionalities to a membrane. Enlightened by the robust adhesion of bioinspired coatings, super-hydrophilic titanium dioxide (TiO 2 )coupled with polyethylenimine (PEI)was stably anchored on the surface of a polydopamine (PDA)-coated membrane through vacuum filtration. The combination of organic-inorganic hybrid layer with PDA coating endowed the composite membrane with an excellent separation performance. Further in-situ formation of silver nanoparticles (Ag NPs)onto the composite membrane enabled the membrane with a high antibacterial activity. The effect of TiO 2 concentration on membrane separation performance was studied. The results demonstrated that PEI plays a key role to achieve a superior dye rejection, although it resulted in a distinctly decrease of water permeability. As the TiO 2 loading amount increases, the water permeability notably enhanced with an overall high rejection of dye solutions. The optimal composite membrane had a quite high water permeability of 40.6 L m −2 h −1 bar −1 , and an excellent dye rejection. Plate counting method results showed that the Ag decorated composite membrane had a high bacteriostatic rate of 99.7%. This facile fabrication procedure and outstanding separation performance suggest that the modified membranes have a high potential in treating dye wastewater.
Tijdschrift: Chemical Engineering Journal
ISSN: 1385-8947
Volume: 373
Pagina's: 275 - 284
Jaar van publicatie:2019
BOF-keylabel:ja
IOF-keylabel:ja
BOF-publication weight:10
CSS-citation score:4
Auteurs:International
Authors from:Higher Education
Toegankelijkheid:Closed