Mechanistic insights into the selective mass-transport and fabrication of holey graphene-based membranes for water purification applications

Hegab, Hanaa M.; Kallem, Parashuram; Pandey, Ravi P.; Ouda, Mariam; Banat, Fawzi; Hasan, Shadi W.

doi:10.1016/j.cej.2021.134248

Cited by 20 publications

(6 citation statements)

References 120 publications

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“…Under electrostatic and steric effects, the free energy barrier of ions can be increased by the functionalization of charged groups. Although the theoretical basis has been established [56,57], creating nanopores with uniform pore size and high pore density remains a formidable challenge. The drilling techniques currently used to fabricate nanoporous graphene include ion bombardment [58], oxygen/hydrogen/argon plasma etching [59][60][61], ion beam irradiation, thermal annealing [62,63], etc.…”

Section: Nanoporous Graphene Membranesmentioning

confidence: 99%

A Review of Advancing Two-Dimensional Material Membranes for Ultrafast and Highly Selective Liquid Separation

Zhang

Zheng

Yu³

et al. 2022

Nanomaterials

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Membrane-based nanotechnology possesses high separation efficiency, low economic and energy consumption, continuous operation modes and environmental benefits, and has been utilized in various separation fields. Two-dimensional nanomaterials (2DNMs) with unique atomic thickness have rapidly emerged as ideal building blocks to develop high-performance separation membranes. By rationally tailoring and precisely controlling the nanochannels and/or nanoporous apertures of 2DNMs, 2DNM-based membranes are capable of exhibiting unprecedentedly high permeation and selectivity properties. In this review, the latest breakthroughs in using 2DNM-based membranes as nanosheets and laminar membranes are summarized, including their fabrication, structure design, transport behavior, separation mechanisms, and applications in liquid separations. Examples of advanced 2D material (graphene family, 2D TMDs, MXenes, metal–organic frameworks, and covalent organic framework nanosheets) membrane designs with remarkably perm-selective properties are highlighted. Additionally, the development of strategies used to functionalize membranes with 2DNMs are discussed. Finally, current technical challenges and emerging research directions of advancing 2DNM membranes for liquid separation are shared.

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Section: Nanoporous Graphene Membranesmentioning

confidence: 99%

A Review of Advancing Two-Dimensional Material Membranes for Ultrafast and Highly Selective Liquid Separation

Zhang

Zheng

Yu³

et al. 2022

Nanomaterials

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“…Attempts are being made to increase the flow of water in many fronts. For example, a particular form of nano-porous graphene, socalled Holey-graphene (HG) [60], consisting of vertically separated arrangement of multilayers of nano-porous graphene, was numerically investigated. Graphene holes can trigger capillarity-driven inhibition to create an equilibrium wetting state and therefore enhanced graphenewater contact areas, hydrophilicity and hence water flow improvement.…”

Section: Improvement Of Water Flowmentioning

confidence: 99%

Progress of water desalination applications based on wettability and surface characteristics of graphene and graphene oxide: A review

Eltigani

Boonyongmaneerat

2022

J Met Mater Miner

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Seawater desalination techniques have been continuously developed to tackle the water scarcity problems. This review article provides comprehensive discussion on the progress of water desalination applications that utilize the unique wettability and surface characteristics of graphene and graphene oxides, which are being employed as ultrafiltration membranes in either a monolayer or multilayer nanosheet configuration. The interaction of water with graphene materials and their wetting characteristics as well as the controlling factors are examined. Particularly, the designs and roles of hydrophilic and hydrophobic nanopores and nanochannels are discussed. A focus is also made on recent developments of graphene membrane with respect to water flow, salt rejection and durability.

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“…Mostly, thermoplastic matrices have been examined to form the graphene derived nanocomposites and membranes for gas separation [20][21][22]. The pore sizes and graphene dispersion patterns directly affect the gaseous molecular permeability and diffusivity features of these membranes [23][24][25]. Consequently, graphene scattering and layering in matrices have been known to develop percolation trails for the diffusing gaseous molecule [26].…”

Section: Introductionmentioning

confidence: 99%

Graphene in gas separation membranes—State-of-the-art and potential spoors

Kausar,

Ahmad

2024

Charact. Appl. Nanomater.

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Graphene and derivatives have been frequently used to form advanced nanocomposites. A very significant utilization of polymer/graphene nanocomposite was found in the membrane sector. The up-to-date overview essentially highpoints the design, features, and advanced functions of graphene nanocomposite membranes towards gas separations. In this concern, pristine thin layer graphene as well as graphene nanocomposites with poly(dimethyl siloxane), polysulfone, poly(methyl methacrylate), polyimide, and other matrices have been perceived as gas separation membranes. In these membranes, the graphene dispersion and interaction with polymers through applying the appropriate processing techniques have led to optimum porosity, pore sizes, and pore distribution, i.e., suitable for selective separation of gaseous molecules. Consequently, the graphene derived nanocomposites brought about numerous revolutions in high performance gas separation membranes. The structural diversity of polymer/graphene nanocomposites has facilitated the membrane selective separation, permeation, and barrier processes especially in the separation of desired gaseous molecules, ions, and contaminants. Future research on the innovative nanoporous graphene-based membrane can overcome design/performance related challenging factors for technical utilizations.

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Mechanistic insights into the selective mass-transport and fabrication of holey graphene-based membranes for water purification applications

Cited by 20 publications

References 120 publications

A Review of Advancing Two-Dimensional Material Membranes for Ultrafast and Highly Selective Liquid Separation

A Review of Advancing Two-Dimensional Material Membranes for Ultrafast and Highly Selective Liquid Separation

Progress of water desalination applications based on wettability and surface characteristics of graphene and graphene oxide: A review

Graphene in gas separation membranes—State-of-the-art and potential spoors

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