An unprecedented high-temperature-tolerance 2D laminar MXene membrane for ultrafast hydrogen sieving

Fan, Yiyi; Wei, Luyang; Meng, Xiuxia; Zhang, Weimin; Yang, Naitao; Jin, Yun; Wang, Xiaobin; Zhao, Mingwen; Liu, Shaomin

doi:10.1016/j.memsci.2018.10.017

Cited by 89 publications

(67 citation statements)

References 49 publications

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“…Plus, their AAO-supported MXene membrane showed no sign of degradation up to 200 h of operation. [113] We find this observation promising for industrially relevant H 2 separation operations. In another promising demonstration, Liu et al employed MXenes as the filler of a poly(ether-block-amide) (PEBA) MMM for CO 2 capture.…”

Section: −mentioning

confidence: 69%

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MXene Materials for Designing Advanced Separation Membranes

et al. 2020

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MXenes are emerging rapidly as a new family of multifunctional nanomaterials with prospective applications rivaling that of graphenes. Herein, a timely account of the design and performance evaluation of MXene‐based membranes is provided. First, the preparation and physicochemical characteristics of MXenes are outlined, with a focus on exfoliation, dispersion stability, and processability, which are crucial factors for membrane fabrication. Then, different formats of MXene‐based membranes in the literature are introduced, comprising pristine or intercalated nanolaminates and polymer‐based nanocomposites. Next, the major membrane processes so far pursued by MXenes are evaluated, covering gas separation, wastewater treatment, desalination, and organic solvent purification. The potential utility of MXenes in phase inversion and interfacial polymerization, as well as layer‐by‐layer assembly for the preparation of nanocomposite membranes, is also critically discussed. Looking forward, exploiting the high electrical conductivity and catalytic activity of certain MXenes is put into perspective for niche applications that are not easily achievable by other nanomaterials. Furthermore, the benefits of simulation/modeling approaches for designing MXene‐based membranes are exemplified. Overall, critical insights are provided for materials science and membrane communities to navigate better while exploring the potential of MXenes for developing advanced separation membranes.

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Section: −mentioning

confidence: 69%

“…In addition to room-temperature operations, MXenes are also useful for niche gas separation applications at high temperatures. Fan et al [113] have shown that MXene-based NLMs give a high selectivity of 41 for H 2 /N 2 separation at 320 °C. Plus, their AAO-supported MXene membrane showed no sign of degradation up to 200 h of operation.…”

Section: −mentioning

confidence: 99%

MXene Materials for Designing Advanced Separation Membranes

et al. 2020

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“…The MXene lamellar membrane was prepared using the similar method illustrated previously [20]. Briefly, Ti 3 C 2 T x was synthesized by etching Ti 3 AlC 2 powders using 50 wt% HF solution at a certain temperature followed with DMSO intercalation.…”

Section: Methodsmentioning

confidence: 99%

“…Generally, MXene 2D materials are a large family of 2D carbides and nitrides with the general formula of M n+1 X n T x , where M represents a transition metal, X is carbon and/or nitrogen, and T is referred to the surface termination [17,18]. Very recently, MXene-based 2D materials have been introduced to fabricate 2D lamellar membranes because of their tunable nanochannel width, excellent mechanical strength, and easy fabrication and integration [2,19,20]. It has been reported that the assembled MXene 2D membranes exhibit a range of attractive characters in separation, e.g., precise ion sieving [21], ultrafast water permeation [22], and gas separation [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…For example, Li et al [24] studied various gas transportations in MXene nanogalleries with molecular dynamic (MD) simulations and activated and Knudsen diffusion being observed for gas diffusion in through MD simulations. Nevertheless, Fan et al [20] found the gas transportation in MXene nanogalleries via the molecular sieving mechanism. Therefore, in order to optimize and promote the performance and the efficiency of the 2D MXene lamellar membranes, the gas transport mechanisms are still needed to be further clarified because they can efficiently provide the guidance for tuning the channel width of 2D lamellar membranes and gas molecule-channel wall interactions in gas transportation.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and Experimental Insights into the Mechanism for Gas Separation through Nanochannels in 2D Laminar MXene Membranes

et al. 2019

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Clarifying the mechanism for the gas transportation in the emerging 2D materials-based membranes plays an important role on the design and performance optimization. In this work, the corresponding studies were conducted experimentally and theoretically. To this end, we measured the gas permeances of hydrogen and nitrogen from their mixture through the supported MXene lamellar membrane. Knudsen diffusion and molecular sieving through straight and tortuous nanochannels were proposed to elucidate the gas transport mechanism. The average pore diameter of 5.05 Å in straight nanochannels was calculated by linear regression in the Knudsen diffusion model. The activation energy for H2 transport in molecular sieving model was calculated to be 20.54 kJ mol−1. From the model, we can predict that the gas permeance of hydrogen (with smaller kinetic diameter) is contributed from both Knudsen diffusion and molecular sieving mechanism, but the permeance of larger molecular gases like nitrogen is sourced from Knudsen diffusion. The effects of the critical conditions such as temperature, the diffusion pore diameter of structural defects, and the thickness of the prepared MXene lamellar membrane on hydrogen and nitrogen permeance were also investigated to understand the hydrogen permeation difference from Knudsen diffusion and molecular sieving. At room temperature, the total hydrogen permeance was contributed 18% by Knudsen diffusion and 82% by molecular sieving. The modeling results indicate that molecular sieving plays a dominant role in controlling gas selectivity.

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MXene‐Based Polymer Composite Membranes for Pervaporation and Gas Separation

Manobalan,

Sumangala

2024

MXene Reinforced Polymer Composites

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An unprecedented high-temperature-tolerance 2D laminar MXene membrane for ultrafast hydrogen sieving

Cited by 89 publications

References 49 publications

MXene Materials for Designing Advanced Separation Membranes

MXene Materials for Designing Advanced Separation Membranes

Theoretical and Experimental Insights into the Mechanism for Gas Separation through Nanochannels in 2D Laminar MXene Membranes

MXene‐Based Polymer Composite Membranes for Pervaporation and Gas Separation

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