Please use this identifier to cite or link to this item:
|Title:||Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration||Authors:||Nie, Lina
Karahan, Huseyin Enis
Guiver, Michael D.
|Keywords:||Engineering::Materials||Issue Date:||2020||Source:||Nie, L., Goh, K., Wang, Y., Lee, J., Huang, Y., Karahan, H. E., . . . Bae, T.-H. (2020). Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration. Science Advances, 6(17), eaaz9184-. doi:10.1126/sciadv.aaz9184||Journal:||Science Advances||Abstract:||Membranes for organic solvent nanofiltration (OSN) or solvent-resistant nanofiltration (SRNF) offer unprecedented opportunities for highly efficient and cost-competitive solvent recovery in the pharmaceutical industry. Here, we describe small-flake graphene oxide (SFGO) membranes for high-performance OSN applications. Our strategy exploits lateral dimension control to engineer shorter and less tortuous transport pathways for solvent molecules. By using La3+ as a cross-linker and spacer for intercalation, the SFGO membrane selective layer was stabilized, and size-dependent ultrafast selective molecular transport was achieved. The methanol permeance was up to 2.9-fold higher than its large-flake GO (LFGO) counterpart, with high selectivity toward three organic dyes. More importantly, the SFGO-La3+ membrane demonstrated robust stability for at least 24 hours under hydrodynamic stresses that are representative of realistic OSN operating conditions. These desirable attributes stem from the La3+ cross-linking, which forms uniquely strong coordination bonds with oxygen-containing functional groups of SFGO. Other cations were found to be ineffective.||URI:||https://hdl.handle.net/10356/145404||ISSN:||2375-2548||DOI:||10.1126/sciadv.aaz9184||Rights:||© 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SCBE Journal Articles|
Updated on Mar 2, 2021
Updated on Mar 8, 2021
Updated on Jul 30, 2021
Updated on Jul 30, 2021
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.