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Title: Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration
Authors: Nie, Lina
Goh, Kunli
Wang, Yu
Lee, Jaewoo
Huang, Yinjuan
Karahan, Huseyin Enis
Zhou, Kun
Guiver, Michael D.
Bae, Tae-Hyun
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.
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

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