Honeycomb-like Hofmann-type metal-organic framework membranes for C2H2/CO2 and H2/CO2 separation

Liu, Hefang; Cong, Shenzhen; Yan, Xueru; Wang, Xiaoyan; Gao, Aotong; Wang, Zhi; Liu, Xinlei

doi:10.1016/j.memsci.2022.121282

Cited by 11 publications

(3 citation statements)

References 41 publications

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“…Furthermore, Liu et al prepared ZJU-74a membranes with 3D honeycomb structure by designing the MOF structure. 63 They first grew sparse lamellar crystals with a c -axis orientation, using time and temperature control, and then used the seeding method for the secondary growth, by which the crystals perpendicular to the substrate covered the neighboring crystals and dominated them, and finally the lamellar crystals with a weak affinity detached and formed new lamellar crystals. With a membrane thickness of 0.8 μm, the membrane was capable of separating CO 2 /H 2 and CO 2 /C 2 H 2 efficiently and with a high durability by blocking the CO 2 by rotation of the ligand and preferentially adsorbing the C 2 H 2 .…”

Section: Optimization Of the Mof-based Gas Separation Membranesmentioning

confidence: 99%

Challenges and recent advances in MOF-based gas separation membranes

Su,

Xiang,

Dai

et al. 2024

Chem. Commun.

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Section: Optimization Of the Mof-based Gas Separation Membranesmentioning

confidence: 99%

Challenges and recent advances in MOF-based gas separation membranes

Su,

Xiang,

Dai

et al. 2024

Chem. Commun.

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“…Recycling PF waste is considered a circular solution to reduce plastic pollution, but existing methods often result in low-grade products at high cost due to the low thermal stability of polystyrene. 4 Honeycomb-patterned films (hc-films) have gained increasing interest in both fundamental research and industry due to their wide range of potential applications, including but not limited to templates, 5,6 separation, 7 tissue engineering, 8 microelectronics, sensors, and energy harvesting and storage. 9,10 A variety of fabrication techniques have been developed for these films, such as lithographic techniques, 11 colloidal templates, 12 block copolymers self-assembly, 13 emulsion and phase separation, 14,15 and breath figure methods (BFs).…”

Section: Introductionmentioning

confidence: 99%

Water transferable, customizable highly ordered honeycomb film from polystyrene foam waste for complex surface patterning in confined space

Le,

Chau,

Van Le

et al. 2024

J of Applied Polymer Sci

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The disposal of plastic foam, mostly composed of polystyrene, poses significant environmental challenges due to its high popularity, slow degradation, and low cost. To address this problem, recycling polystyrene foam waste (PF) has emerged as a promising solution to reduce plastic pollution. This paper presents a novel approach to mass‐produce highly ordered, porous honeycomb‐patterned film (hc‐film) using wasted PF as the raw material. The hc‐film is produced using an improved phase separation (IPS) method that utilizes methanol as a suitable pore inducer and template droplet stabilizer. Methanol provides the hc‐film with customizable features such as pore ordering, size, and separation. The freestanding hc‐film, achieved by adopting a water‐soluble polystyrene sulfonate as a scarified layer, can be transferred and utilized as a flexible mold to pattern various solid substrates with complicated surface morphologies using the pre‐impregnated technique. This study demonstrates the potential of this cost‐effective and efficient approach for various applications, such as super/anti‐wetting surfaces, microelectronics, optical devices, sensors, and nanogenerators.

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“…For example, 2D membranes for separating H 2 from a mixture (including CH 4 for example) have been developed previously, according to their distinct molecular sizes. − However, a 2D porous membrane for C 2 H 2 /CO 2 separation has been rarely reported. Considering the identical kinetic diameter of C 2 H 2 and CO 2 molecules, it is almost impossible for a sieving membrane to separate C 2 H 2 /CO 2 with high selectivity. , Recently, Li et al employed a porous g-C 9 N 7 membrane to realize effective CO 2 /C 2 H 2 separation via tuning the charges or the lateral strains of the porous 2D material, which might be difficult to implement in practice.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient CO₂/C₂H₂ Separation by Porous Graphene via Quadrupole Gating Mechanism

et al. 2023

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Acetylene (C 2 H 2 ) is an important and widely used raw material in various industries (such as petrochemical). Generally, a product yield is proportional to the purity of C 2 H 2 ; however, C 2 H 2 from a typical industrial gasproduction process is commonly contaminated by CO 2 . So far, the achievement of high-purity C 2 H 2 separated from a CO 2 /C 2 H 2 mixture is still challenging due to their very close molecular dimensions and boiling temperatures. Taking advantage of their quadrupoles with opposite signs, here, we show that the graphene membrane embedded with crown ether nanopores can achieve an unprecedented separation efficiency of CO 2 /C 2 H 2 . Combining the molecular dynamics simulation and the density functional theory (DFT) approaches, we discovered that the electrostatic gas-pore interaction favorably allows the fast transport of CO 2 through crown ether nanopores while completely prohibiting C 2 H 2 transport, which yields a remarkable permeation selectivity. In particular, the utilized crown ether pore is capable of allowing the individual transport of CO 2 while completely rejecting the passage of C 2 H 2 , independent of the applied pressures, fed gases ratios, and exerted temperatures, featuring the superiority and robustness of the crown pore in CO 2 /C 2 H 2 separation. Further, DFT and PMF calculations demonstrate that the transport of CO 2 through the crown pore is energetically more favorable than the transport of C 2 H 2 . Our findings reveal the potential application of graphene crown pore for CO 2 separation with outstanding performance.

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Honeycomb-like Hofmann-type metal-organic framework membranes for C2H2/CO2 and H2/CO2 separation

Cited by 11 publications

References 41 publications

Challenges and recent advances in MOF-based gas separation membranes

Challenges and recent advances in MOF-based gas separation membranes

Water transferable, customizable highly ordered honeycomb film from polystyrene foam waste for complex surface patterning in confined space

Highly Efficient CO₂/C₂H₂ Separation by Porous Graphene via Quadrupole Gating Mechanism

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Honeycomb-like Hofmann-type metal-organic framework membranes for C2H2/CO2 and H2/CO2 separation

Cited by 11 publications

References 41 publications

Challenges and recent advances in MOF-based gas separation membranes

Challenges and recent advances in MOF-based gas separation membranes

Water transferable, customizable highly ordered honeycomb film from polystyrene foam waste for complex surface patterning in confined space

Highly Efficient CO2/C2H2 Separation by Porous Graphene via Quadrupole Gating Mechanism

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Product

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Highly Efficient CO₂/C₂H₂ Separation by Porous Graphene via Quadrupole Gating Mechanism