Microporous ZIF-8 and ZIF-67 membranes grown on mesoporous alumina substrate for selective propylene transport

Tran, Nguyen Tien; Kim, Jin-Soo; Othman, Mohd Roslee

doi:10.1016/j.seppur.2019.116026

Cited by 38 publications

(19 citation statements)

References 55 publications

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“…8,36 In another study, UiO-66 also reportedly consisted of a regular octahedron or dual polyhedron of a cube that formed a rectified tetrahedron. 37 The UiO-66 individual particles synthesized in this work which resembled the regular octahedron structures are consistent with the previous reports. 36,37 Figure 4b depicts the XRD patterns of UiO-66/PVA-90 after heat treatment in the air at a heating rate of 5 K min −1 , indicating that the crystallinity of UiO-66 nanoparticles was stable at 350 °C.…”

Section: Resultssupporting

confidence: 92%

Freeze Granulation of Nanoporous UiO-66 Nanoparticles for Capture of Volatile Organic Compounds

Kim

Othman

2021

ACS Appl. Nano Mater.

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Nanoporous UiO-66 spherical beads prepared by using PVA binder successfully connected UiO-66 nanoparticles together into granular beads with improved mechanical strength for toluene capture. This was achieved without affecting the crystalline nature and micropore structures of the material. The regular octahedron of the UiO-66 individual nanoparticle remained intact, and the micropore size did not change with increasing PVA addition without which the nanoporous UiO-66 could not granulate into beads. However, PVA bound the nanoparticles together to form compact and cohesive network clusters that reduced the BET surface area and total pore volume. This consequently lowered the toluene adsorption efficacy slightly due to the premature breakthrough that limited the toluene molecular exposure into the micropores of the individual UiO-66 nanoparticles.

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Section: Resultssupporting

confidence: 92%

Freeze Granulation of Nanoporous UiO-66 Nanoparticles for Capture of Volatile Organic Compounds

Kim

Othman

2021

ACS Appl. Nano Mater.

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“…28 Also, ZIF-8 with high porosity was introduced into the polymer, accelerating exchange rate between solvent and non-solvent to improve the permeability. 29…”

Section: Introductionmentioning

confidence: 99%

High performance polyvinylidene fluoride (PVDF) mixed matrix membrane (MMM) doped by various zeolite imidazolate frameworks

Liu

Chen

Mao

et al. 2020

High Performance Polymers

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Zeolitic imidazolate framework (ZIF-8) in three particle sizes (40, 70 and 100 nm) was prepared through both solvothermal and hydrothermal methods and employed to decorate polyvinylidene fluoride (PVDF). The finger-like macro-voids, sponge-like poly-porous morphology and surface roughness of prepared membranes were characterized by SEM and AFM microscopy. The FTIR spectrum and XPS analysis bear out the chemical component. ZIF-8 has the characteristics of higher porosity and appropriate pore size, which is a condition for improving the permeability and pollution resistance of the modified membrane. Results indicated that different ZIF-8s have different enhancement effects on PVDF MMM. 100 nm ZIF-8 membrane possessed pure water flux (PWF) of 350 L m−2h−1, which was 10 times more than the bare membrane (30 L m−2h−1), and OVA flux recovery ration (FRR%) is 98%. 40 nm ZIF-8 membrane owned BSA FRR% of 98.4%. The 70 nm ZIF-8 showed the best mechanical properties. The dynamic contact angles of UP-Z70 ranged from 104.5° to 62.5° within 180 s. Furthermore, pore size distribution, molecular weight cut-off (MWCO) and porosity were also researched to evaluate the MMM. The dislodge of Reactive Black KN-B, Reactive Red 3BS and Reactive Brilliant Blue KN-R dyes by MMM were studied under different dye concentrations and transmembrane pressures. The membrane can provide selective separation methods for dyes and Reactive Brilliant Blue KN-R up to 99%. Overall, the permeability, hydrophilicy, anti-fouling performance and wastewater treatment of modified membranes were regulated by the ZIF-8 in a steerable blending reaction modification process.

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“…Theoretical calculations also supported ZIF-67 being a better candidate than ZIF-8 for propylene purification . Nevertheless, few ZIF-67 membranes exhibited better experimental C 3 H 6 /C 3 H 8 separation performance than ZIF-8 membranes except for the ZIF-8/ZIF-67/ZIF-8 triple layer membrane. ,− …”

mentioning

confidence: 99%

Balancing the Grain Boundary Structure and the Framework Flexibility through Bimetallic Metal–Organic Framework (MOF) Membranes for Gas Separation

et al. 2020

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Separation is one of the most energy-intensive processes in the chemical industry, and membrane-based separation technology helps to reduce the energy consumption dramatically. Supported metal–organic framework (MOF) layers hold great promise as a molecular sieve membrane, yet only a few MOF membranes showed the expected separation performance. The main reasons include e.g. nonselective grain boundary transport or the flexible MOF framework, especially the inevitable linker rotation. Here, we propose a crystal engineering strategy that balances the grain boundary structure and framework flexibility in Co–Zn bimetallic zeolitic imidazolate framework (ZIF) membranes and exploit their contributions to the improvement of membrane quality and separation performance. It reveals that a good balance between the two trade-off factors enabled a “sweet spot” that offers the best C3H6/C3H8 separation factor up to 200.

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Microporous ZIF-8 and ZIF-67 membranes grown on mesoporous alumina substrate for selective propylene transport

Cited by 38 publications

References 55 publications

Freeze Granulation of Nanoporous UiO-66 Nanoparticles for Capture of Volatile Organic Compounds

Freeze Granulation of Nanoporous UiO-66 Nanoparticles for Capture of Volatile Organic Compounds

High performance polyvinylidene fluoride (PVDF) mixed matrix membrane (MMM) doped by various zeolite imidazolate frameworks

Balancing the Grain Boundary Structure and the Framework Flexibility through Bimetallic Metal–Organic Framework (MOF) Membranes for Gas Separation

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