Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration

被引:234
作者
Nie, Lina [1 ]
Goh, Kunli [1 ,2 ]
Wang, Yu [3 ]
Lee, Jaewoo [2 ]
Huang, Yinjuan [4 ]
Karahan, H. Enis [1 ,2 ]
Zhou, Kun [3 ]
Guiver, Michael D. [5 ,6 ]
Bae, Tae-Hyun [1 ,7 ]
机构
[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore
[2] Nanyang Technol Univ, Singapore Membrane Technol Ctr, Nanyang Environm & Water Res Inst, Singapore 637141, Singapore
[3] Nanyang Technol Univ, Environm Proc Modelling Ctr, Nanyang Environm & Water Res Inst, Singapore 637141, Singapore
[4] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
[5] Tianjin Univ, Sch Mech Engn, State Key Lab Engines, Tianjin 300072, Peoples R China
[6] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
[7] Korea Adv Inst Sci & Technol KAIST, Dept Chem & Biomed Engn, Daejeon 305338, South Korea
关键词
RESISTANT NANOFILTRATION; CROSS-LINKING; SEPARATION; BEHAVIOR; WATER; FRAMEWORKS; NANOFILMS; POLYMERS; RADII;
D O I
10.1126/sciadv.aaz9184
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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 La(3+ )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.
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页数:12
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