CAS OpenIR
"Mix-Then-On-Demand-Complex": In Situ Cascade Anionization and Complexation of Graphene Oxide for High-Performance Nanofiltration Membranes
Li, Xiaoting1,2; Wang, Yanlei3; Chang, Jian2; Sun, Hao1; He, Hongyan3; Qian, Cheng3; Kheirabad, Atefeh Khorsand2; An, Quan-Fu1; Wang, Naixin1; Zhang, Miao2; Yuan, Jiayin2
2021-03-23
Source PublicationACS NANO
ISSN1936-0851
Volume15Issue:3Pages:4440-4449
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.

KeywordGraphene Oxide Ionic Complexation Nanofiltration Poly(Ionic Liquid) Confinement Effect
DOI10.1021/acsnano.0c08308
Language英语
Funding ProjectEuropean Research Council (ERC)[NAPOLI-639720] ; Swedish Research Council[2018-05351] ; Verband der Chemischen Industrie e.V. (VCI) in Germany[Dozentenpreis 15126] ; Wallenberg Academy Fellow program in Sweden[KAW 2017.0166] ; Stockholm University Strategic Fund[SU FV-2.1.1-005] ; National Natural Science Foundation of China[21776003]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Funding OrganizationEuropean Research Council (ERC) ; Swedish Research Council ; Verband der Chemischen Industrie e.V. (VCI) in Germany ; Wallenberg Academy Fellow program in Sweden ; Stockholm University Strategic Fund ; National Natural Science Foundation of China
WOS IDWOS:000634569100062
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48347
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Naixin; Zhang, Miao; Yuan, Jiayin
Affiliation1.Beijing Univ Technol, Beijing Key Lab Green Catalysis & Separat, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
2.Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Xiaoting,Wang, Yanlei,Chang, Jian,et al. "Mix-Then-On-Demand-Complex": In Situ Cascade Anionization and Complexation of Graphene Oxide for High-Performance Nanofiltration Membranes[J]. ACS NANO,2021,15(3):4440-4449.
APA Li, Xiaoting.,Wang, Yanlei.,Chang, Jian.,Sun, Hao.,He, Hongyan.,...&Yuan, Jiayin.(2021)."Mix-Then-On-Demand-Complex": In Situ Cascade Anionization and Complexation of Graphene Oxide for High-Performance Nanofiltration Membranes.ACS NANO,15(3),4440-4449.
MLA Li, Xiaoting,et al.""Mix-Then-On-Demand-Complex": In Situ Cascade Anionization and Complexation of Graphene Oxide for High-Performance Nanofiltration Membranes".ACS NANO 15.3(2021):4440-4449.
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