Grain size control of ZIF-8 membranes by seeding-free aqueous synthesis and their performances in propylene/propane separation

Tanaka, Shunsuke; Okubo, Kenta; Kida, Koji; Sugita, Miki; Takewaki, Takahiko

doi:10.1016/j.memsci.2017.09.037

Cited by 60 publications

(49 citation statements)

References 39 publications

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“…The overall performances of LIPS membranes, in terms of propylene permeance and propylene/ propane selectivity, are among the best that have been reported for both ZIF-8 and ZIF-67 membranes ( Fig. 1D and table S1) (5,6,10,13,18,19,(23)(24)(25)(26)(27)(28).…”

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confidence: 60%

Zeolitic imidazolate framework membranes made by ligand-induced permselectivation

Kumar

Mittal

et al. 2018

Science

358

289

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Zeolitic imidazolate framework (ZIF) membranes are emerging as a promising energy-efficient separation technology. However, their reliable and scalable manufacturing remains a challenge. We demonstrate the fabrication of ZIF nanocomposite membranes by means of an all-vapor-phase processing method based on atomic layer deposition (ALD) of ZnO in a porous support followed by ligand-vapor treatment. After ALD, the obtained nanocomposite exhibits low flux and is not selective, whereas after ligand-vapor (2-methylimidazole) treatment, it is partially transformed to ZIF and shows stable performance with high mixture separation factor for propylene over propane (an energy-intensive high-volume separation) and high propylene flux. Membrane synthesis through ligand-induced permselectivation of a nonselective and impermeable deposit is shown to be simple and highly reproducible and holds promise for scalability.

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confidence: 60%

Zeolitic imidazolate framework membranes made by ligand-induced permselectivation

Kumar

Mittal

et al. 2018

Science

358

289

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“…The grain density observed here, in 10-12 min of growth, is an order of magnitude larger than that reported in the literature. 55 The grains become relatively less uniform at longer growth time ( Fig. 2g and h).…”

Section: Resultsmentioning

confidence: 91%

Synthesis of high-performance polycrystalline metal–organic framework membranes at room temperature in a few minutes

et al. 2020

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“…For the H 2 /CH 4 mixture, the H 2 ‐separation performance of the ZIF‐8/GONR/PES membrane (marked with red stars) surpassed those of previous ZIF‐8 membranes fabricated on polymeric supports (marked with blue diamonds) and was comparable to those of ZIF‐8 membranes fabricated on inorganic support [ 27,30–46 ] (marked with hollow circles) (Figure 3e and Table S1, Supporting Information). For the H 2 /C 3 H 8 mixture, however, the H 2 selectivity was drastically enhanced without sacrificing the hydrogen permeance, leading to ultrafast, selective H 2 separation performance, as marked with a red star in Figure 3f and Table S2, Supporting Information.…”

Section: Resultsmentioning

confidence: 82%

Pore Tuning of Metal‐Organic Framework Membrane Anchored on Graphene‐Oxide Nanoribbon

Choi

Kim

Choi

et al. 2021

Adv Funct Materials

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Although the pore structures and gas transport properties of metal‐organic frameworks (MOFs) have been tuned mainly by modifying the framework building blocks, a pore‐tuned zeolitic imidazolate framework (ZIF)‐8 layer is directly grown on graphene oxide nanoribbons (GONR)‐treated polymer substrate. Oxygen‐containing functional groups and GONR dangling‐carbon bonds facilitated the spontaneous growth of ZIF‐8 oriented to the (100) grain on the GONR surface and also enhanced the rigidity by strongly anchoring the ZIF‐8 layer by metal‐carbon chemisorption. Gas permeation and molecular simulation results confirmed that the effective aperture size of ZIF‐8 is adjusted to 3.6 Å. As a result, ultrafast H2 permeance of 7.6 × 10−7 mol m−2 Pa s is achieved while blocking large hydrocarbon molecules. In particular, the membrane showed exceptionally enhanced hydrogen selectivity for the mixture separation than ideal selectivity, owing to the competitive transport between H2 and large hydrocarbon molecules, and the separation performance surpassed those of ZIF membranes previously fabricated on polymeric supports.

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Grain size control of ZIF-8 membranes by seeding-free aqueous synthesis and their performances in propylene/propane separation

Cited by 60 publications

References 39 publications

Zeolitic imidazolate framework membranes made by ligand-induced permselectivation

Zeolitic imidazolate framework membranes made by ligand-induced permselectivation

Synthesis of high-performance polycrystalline metal–organic framework membranes at room temperature in a few minutes

Pore Tuning of Metal‐Organic Framework Membrane Anchored on Graphene‐Oxide Nanoribbon

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