Single-layer graphene membranes by crack-free transfer for gas mixture separation

Huang, Shiqi; Dakhchoune, Mostapha; Luo, Wen; Oveisi, Emad; He, Guangwei; Rezaei, Mojtaba; Zhao, Jing; Alexander, Duncan T. L.; Züttel, Andreas; Strano, Michael S.; Agrawal, Kumar Varoon

doi:10.1038/s41467-018-04904-3

Cited by 165 publications

(241 citation statements)

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“…Recently, we reported a nanoporous carbon film based reinforcement for crack-free transfer of graphene. 35 However, this approach requires a high-temperature pyrolysis step, which is not compatible with functional organic layers on graphene. Therefore, the PTMSP approach introduced here is uniquely appropriate as a mechanical support for organo-functionalized graphene membranes, such as the one in this work.…”

Section: The Microstructure Of Spong Membranesmentioning

confidence: 99%

“…34 Recently, we demonstrated the separation of gas molecules from single-layer graphene by the size-sieving mechanism, with a sieving-resolution of 1 Å (for example, H 2 from CH 4 ). 35 For postcombustion capture, one needs to separate CO 2 from N 2 , where the difference in the kinetic diameters is only 0.3 Å. A way forward to achieve this is to functionalize the graphene surface with CO 2 -philic groups, which can enhance the selective adsorption of CO 2 from the gas phase to the graphene nanopores.…”

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confidence: 99%

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High-permeance polymer-functionalized single-layer graphene membranes that surpass the postcombustion carbon capture target

Huang

Villalobos

et al. 2019

Energy Environ. Sci.

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107

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Section: The Microstructure Of Spong Membranesmentioning

confidence: 99%

mentioning

confidence: 99%

High-permeance polymer-functionalized single-layer graphene membranes that surpass the postcombustion carbon capture target

Huang

Villalobos

et al. 2019

Energy Environ. Sci.

Self Cite

107

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“…This problem can be resolved via exposing the graphene surface directly without removing the mechanical supporting film. Such methodology was developed by Agarwal's team 64 where they had grown a nanoporous carbon film (NPC) on top of graphene via coating a block copolymer followed by pyrolysis. Despite of its few intrinsic defects (5.4 × 10 10 cm −2 ), the CVD-grown mm-long graphene monolayer displayed an attractive high permeance (~4.1 × 10 −7 mol m −2 s −1 Pa −1 ) and selectivity (25) for H 2 against CH 4 .…”

Section: Monolayered Graphene Membranesmentioning

confidence: 99%

Combining Silk Sericin and Surface Micropatterns in Bacterial Cellulose Dressings to Control Fibrosis and Enhance Wound Healing

Boni¹,

Lamboni²,

Bakadia³

et al. 2020

Eng. Sci.

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Graphene has been hailed as a revolutionary membrane material because of its many alluring features and the ease in their tunability. In specific to gas separation industry, the exceptional molecular transport, the possibility of fabricating membranes having thickness at a nanoscale range and the robust lattice structure that can withstand to the rigorous perforation methods render graphene to stand ahead of its contemporary materials. Moreover, its broad chemical tolerance and high mechanical strength facilitate the mass-production of membranes possessing macroscopic dimensions and their subsequent long-term operation under harsh environments. In this concise review, we complied and discussed the progress of gas-separation performance of graphene-based membranes with a prime focus on recent advancements in scalability, functionalization/modification along with the new manufacturing processes including the budding approaches through synthetic chemistry. The strategies implemented, the factors that influenced the membranes'performance and the corresponding transport mechanisms were highlighted in detail. In the end, we outlined the daunting challenges facing by these graphene-based membranes in realization of their prospects as well as the proposed measures for alleviating them.

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“…However, facile, cost‐effective processes to form nanoscale defects in the graphene lattice, specifically with a narrow size distribution and high density over large areas remain elusive. We emphasize that size selective separations with large‐area NATMs have so far been limited to using top‐down approaches for nanopore formation in graphene, i.e., lithography, ion bombardment followed by acid etch, oxygen plasma etching, ion bombardment followed by oxygen plasma etch, and oxide nanoparticle induced etching, among others . Top‐down approaches for nanopore formation generally add multiple processing steps, increasing process complexity for membrane fabrication and in some cases are not scalable …”

mentioning

confidence: 99%

Facile Fabrication of Large‐Area Atomically Thin Membranes by Direct Synthesis of Graphene with Nanoscale Porosity

et al. 2018

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NATMs). [1,3,[7][8][9][10][11][12][13][14][15][16][17][18] Such NATMs with extremely high permeance and selectivity [3,4,7,8,[12][13][14][15][16][17][18][19][20] are expected to offer significant advances over current state-of-the-art polymer membranes, specifically for diffusion-based separation processes such as dialysis. [9] However, i) large-area membrane quality graphene synthesis [1,21,22] and transfer to suitable porous supports (without polymer residue or other contamination from transfer), [1,9,21,[23][24][25][26] ii) mitigation of nonselective leakage by plugging tears/ damages to graphene from transfer and subsequent processing during membrane fabrication, [1,9,13,26] and most importantly iii) the formation of nanopores with a high density and narrow size distribution using cost-effective, scalable processes [1,9,13,27,28] are some of the major challenges that need to be collectively addressed to realize NATMs for practical applications. [22,29] Here, we note that large-area monolayer graphene synthesis has been demonstrated via roll-to-roll chemical vapor deposition (CVD) processes. [22,30] Further, graphene transfer at large scale has also been shown [30,31] (although complete elimination of polymer residue remains nontrivial) [17,32,33] and widely used scalable membrane manufacturing techniques such as interfacial polymerization have been adapted to effectively plug leakage across tears/damage in graphene. [13] However, facile, cost-effective processes to form nanoscale defects in Direct synthesis of graphene with well-defined nanoscale pores over large areas can transform the fabrication of nanoporous atomically thin membranes (NATMs) and greatly enhance their potential for practical applications. However, scalable bottom-up synthesis of continuous sheets of nanoporous graphene that maintain integrity over large areas has not been demonstrated. Here, it is shown that a simple reduction in temperature during chemical vapor deposition (CVD) on Cu induces in-situ formation of nanoscale defects (≤2-3 nm) in the graphene lattice, enabling direct and scalable synthesis of nanoporous monolayer graphene. By solution-casting of hierarchically porous polyether sulfone supports on the as-grown nanoporous CVD graphene, large-area (>5 cm2 ) NATMs for dialysis applications are demonstrated. The synthesized NATMs show size-selective diffusive transport and effective separation of small molecules and salts from a model protein, with ≈2-100× increase in permeance along with selectivity better than or comparable to state-of-the-art commercially available polymeric dialysis membranes. The membranes constitute the largest fully functional NATMs fabricated via bottom-up nanopore formation, and can be easily scaled up to larger sizes permitted by CVD synthesis. The results highlight synergistic benefits in blending traditional membrane casting with bottom-up pore creation during graphene CVD for advancing NATMs toward practical applications.

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Single-layer graphene membranes by crack-free transfer for gas mixture separation

Cited by 165 publications

References 50 publications

High-permeance polymer-functionalized single-layer graphene membranes that surpass the postcombustion carbon capture target

High-permeance polymer-functionalized single-layer graphene membranes that surpass the postcombustion carbon capture target

Combining Silk Sericin and Surface Micropatterns in Bacterial Cellulose Dressings to Control Fibrosis and Enhance Wound Healing

Facile Fabrication of Large‐Area Atomically Thin Membranes by Direct Synthesis of Graphene with Nanoscale Porosity

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