Fabrication of surface-charged MXene membrane and its application for water desalination

Meng, Baochun; Liu, Guozhen; Mao, Yangyang; Feng, Liang; Liu, Gongping; Jin, Wanqin

doi:10.1016/j.memsci.2021.119076

Cited by 110 publications

(31 citation statements)

References 51 publications

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“…Surface charge on 2D material composite NF membranes is able to exclude ions or charged organic dyes by the charge interaction principle. [ 2 , 80 , 101 ] Recently, Zhang et al. created surface charges on GO membranes and realized controllable ion transport without impeding water permeation ( Figure 17 a ).…”

Section: State‐of‐the‐art Designs Of 2d Materials Nf Membranesmentioning

confidence: 99%

2D Material Nanofiltration Membranes: From Fundamental Understandings to Rational Design

et al. 2021

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Since the discovery of 2D materials, 2D material nanofiltration (NF) membranes have attracted great attention and are being developed with a tremendously fast pace, due to their energy efficiency and cost effectiveness for water purification. The most attractive aspect for 2D material NF membranes is that, anomalous water and ion permeation phenomena have been constantly observed because of the presence of the severely confined nanocapillaries (<2 nm) in the membrane, leading to its great potential in achieving superior overall performance, e.g., high water flux, high rejection rates of ions, and high resistance to swelling. Hence, fundamental understandings of such water and ion transport behaviors are of great significance for the continuous development of 2D material NF membranes. In this work, the microscopic understandings developed up to date on 2D material NF membranes regarding the abnormal transport phenomena are reviewed, including ultrafast water and ion permeation rates with the magnitude several orders higher than that predicted by conventional diffusion behavior, ion dehydration, ionic Coulomb blockade, ion-ion correlations, etc. The state-of-the-art structural designs for 2D material NF membranes are also reviewed. Discussion and future perspectives are provided highlighting the rational design of 2D material membrane structures in the future.

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Section: State‐of‐the‐art Designs Of 2d Materials Nf Membranesmentioning

confidence: 99%

2D Material Nanofiltration Membranes: From Fundamental Understandings to Rational Design

et al. 2021

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“…Membrane separation methods are widely used for various purposes: environmental cleaning, [ 53,54 ] selective ion concentration, [ 54,55 ] and water desalination. [ 56,57 ] The principle of forming a freestanding film is based on the formation of a polyelectrolyte complex (PEC). [ 58 ] The complexation process includes compensating the charge of the polyelectrolyte with the oppositely charged polyelectrolyte.…”

Section: Freestanding Filmsmentioning

confidence: 99%

Recent Progress of Layer‐by‐layer Assembly, Free‐Standing Film and Hydrogel Based on Polyelectrolytes

Ivanov

Pershina

Nikolaev

et al. 2021

Macromolecular Bioscience

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Nowadays, polyelectrolytes play an essential role in the development of new materials. Their use allows creating new properties of materials and surfaces and vary them in a wide range. Basically, modern methods are divided into three areas—the process of layer‐by‐layer deposition, free‐standing films, and hydrogels based on polyelectrolytes. Layer‐by‐layer assembly of polyelectrolytes on various surfaces is a powerful technique. It allows giving surfaces new properties, for example, protect them from corrosion. Free‐standing films are essential tools for the design of membranes and sensors. Hydrogels based on polyelectrolytes have recently shown their applicability in electrical and materials science. The creation of new materials and components with controlled properties can be achieved using polyelectrolytes. This review focuses on new technologies that have been developed with polyelectrolytes over the last five years.

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“…Ti 3 C 2 T x has also been used as an intercalation material in membranes to enhance the desalination via capacitive deionization 28 , 29 . Also, fabricating surface charged MXene membranes generates a performance during nanofiltration and/or forward osmosis processes 30 . Research in desalination processes has been focused to Ti 3 C 2 T x MXene.…”

Section: Introductionmentioning

confidence: 99%

Atomic-scale understanding of the Na and Cl trapping on the Mo1.33C(OH)2-MXene

Guerrero-Sánchez

Muñoz-Pizza

Moreno-Armenta

et al. 2022

Sci Rep

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Drinking water scarcity in arid and semi-arid regions is a reality that may turn into a global healthcare problem in the next few years. The scientific community is always looking for new materials to achieve effective sea and brackish water desalination to reduce water scarcity. Commonly, theoretical, and experimental methods make a synergy to better understand and explain the chemical and physical processes in water desalination electrodes. In this way, experimental evidence pointed Mo1.33CTx MXene as an efficient ion intercalation material, in which both Na+ and Cl− are removed. However, the atomic scale understanding of the physicochemical processes due to the Na and Cl interaction with the MXene is still unknown. We report the Na0 and Cl0 interaction with an OH functionalized Mo1.33C monolayer through a comprehensive first-principles density functional theory assessment. Results demonstrate that Na atoms attach to Oxygen, whereas Cl atoms bond through hydrogen bonds to the functional groups in the MXene, these bonds have two energy contributions: electrostatic and charge transfer, which increases its adsorption energy. Electrostatic potential isosurfaces, Bader charge analysis, and non-covalent interactions index help clarifying the way Na0 and Cl0 attach to the MXene layer. Oxygen atoms have an affinity for the electropositive Na0 atoms, which after interaction oxidizes to Na+, whereas hydrogen atoms—of the hydroxyl groups—interact with the electronegative Cl0 atoms, which upon adsorption reduce to Cl−. Our findings explain why OH-functionalized Mo1.33C can efficiently remove both Na and Cl atoms based on their affinities with the functional groups present in the MXene layer.

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Fabrication of surface-charged MXene membrane and its application for water desalination

Cited by 110 publications

References 51 publications

2D Material Nanofiltration Membranes: From Fundamental Understandings to Rational Design

2D Material Nanofiltration Membranes: From Fundamental Understandings to Rational Design

Recent Progress of Layer‐by‐layer Assembly, Free‐Standing Film and Hydrogel Based on Polyelectrolytes

Atomic-scale understanding of the Na and Cl trapping on the Mo1.33C(OH)2-MXene

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