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Author:

Li, Xiaoting (Li, Xiaoting.) | Wang, Yanlei (Wang, Yanlei.) | Chang, Jian (Chang, Jian.) | Sun, Hao (Sun, Hao.) | He, Hongyan (He, Hongyan.) | Qian, Cheng (Qian, Cheng.) | Kheirabad, Atefeh Khorsand (Kheirabad, Atefeh Khorsand.) | An, Quan-Fu (An, Quan-Fu.) | Wang, Naixin (Wang, Naixin.) (Scholars:王乃鑫) | Zhang, Miao (Zhang, Miao.) | Yuan, Jiayin (Yuan, Jiayin.)

Indexed by:

EI Scopus SCIE PubMed

Abstract:

Assembling two-dimensional (2D) materials by polyelectrolyte often suffers from inhomogeneous microstructures due to the conventional mixing-and-simultaneous-complexation procedure ("mix-and-complex") in aqueous solution. Herein a "mix-then-on-demand-complex" concept via on-demand in situ cascade anionization and ionic complexation of 2D materials is raised that drastically improves structural order in 2D assemblies, as exemplified by classical graphene oxide (GO)-based ultrathin membranes. Specifically, in dimethyl sulfoxide, the carboxylic acid-functionalized GO sheets (COOH-GOs) were mixed evenly with a cationic poly(ionic liquid) (PIL) and upon filtration formed a well-ordered layered composite membrane with homogeneous distribution of PIL chains in it; next, whenever needed, it was alkali-treated to convert COOH-GO in situ into its anionized state COO--GO that immediately complexed ionically with the surrounding cationic PIL chains. This "mix-then-on-demand-complex" concept separates the ionic complexation of GO and polyelectrolytes from their mixing step. By synergistically combining the PIL-induced hydrophobic confinement effect and supramolecular interactions, the as-fabricated nanofiltration membranes carry interface transport nanochannels between GO and PIL, reaching a high water permeability of 96.38 L m(-2) h(-1) bar(-1) at a maintained excellent dye rejection 99.79% for 150 h, exceeding the state-of-the-art GO-based hybrid membranes. The molecular dynamics simulations support the experimental data, confirming the interface spacing between GO and PIL as the water transport channels.

Keyword:

confinement effect nanofiltration poly(ionic liquid) graphene oxide ionic complexation

Author Community:

  • [ 1 ] [Li, Xiaoting]Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Sun, Hao]Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 3 ] [An, Quan-Fu]Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Wang, Naixin]Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Li, Xiaoting]Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden
  • [ 6 ] [Chang, Jian]Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden
  • [ 7 ] [Kheirabad, Atefeh Khorsand]Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden
  • [ 8 ] [Zhang, Miao]Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden
  • [ 9 ] [Yuan, Jiayin]Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden
  • [ 10 ] [Wang, Yanlei]Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
  • [ 11 ] [He, Hongyan]Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
  • [ 12 ] [Qian, Cheng]Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China

Reprint Author's Address:

  • 王乃鑫

    [Wang, Naixin]Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Coll Environm & Energy Engn, Beijing 100124, Peoples R China;;[Zhang, Miao]Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden;;[Yuan, Jiayin]Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden

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Source :

ACS NANO

ISSN: 1936-0851

Year: 2021

Issue: 3

Volume: 15

Page: 4440-4449

1 7 . 1 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:96

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 35

SCOPUS Cited Count: 39

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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