Synthesis of ZIF-68 Membrane on a ZnO Modified α-Alumina Support by a Modified Reactive Seeding Method

Kasik, Alexandra; James, Joshua B.; Lin, Jerry Y S

doi:10.1021/acs.iecr.6b00236

Cited by 31 publications

(22 citation statements)

References 28 publications

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“…These relationships suggest that the fabricated AFI membrane contains a negligible amount of microporous defects and the gas transport mechanism is Knudsen diffusion. The gas permeance values of the AFI membrane are comparable to those of the ZIF-68 membrane which has a similar pore size (7.5 Å) and straight 1D channels [33] after normalizing with the membrane thickness. Fig.…”

Section: Gas Permeation and Pervaporation Testsmentioning

confidence: 66%

Fabrication and molecular transport studies of highly c-Oriented AFI membranes

Liu

Zhang

Liu

et al. 2017

Journal of Membrane Science

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The AFI membrane with one-dimensional straight channels is an ideal platform for various applications. In this work, we report the fabrication of a highly c-oriented, compact and stable AFI membrane by epitaxial growth from an almost close-packed and c-oriented monolayer of plate-like seeds that is manually assembled on a porous alumina support. The straight channels in the membrane are not only aligned vertically along the membrane depth, but are also continuous without disruption. The transport resistance is thus minimized and as a result, the membrane shows almost two orders of magnitude greater permeance in pervaporation of hydrocarbons compared to reported values in the literature. The selectivity of p-xylene to 1,3,5triisopropylbenzene (TIPB) is approximately 850. In addition, through gas permeation studies on a number of gas and liquid molecules, different transport mechanisms including activated Knudsen diffusion, surface diffusion and molecular sieving were discovered for different diffusion species. The ratio of kinetic diameter to channel diameter, d m /d c , and the ratio of the Lennard-Jones length constant to channel diameter, σ m /d c , are found very useful in explaining the different transport behaviors. These results should be useful not only for potential industrial applications of the AFI membranes but also for the fundamental understanding of transport in nanoporous structures.

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Section: Gas Permeation and Pervaporation Testsmentioning

confidence: 66%

Fabrication and molecular transport studies of highly c-Oriented AFI membranes

Liu

Zhang

Liu

et al. 2017

Journal of Membrane Science

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“…Zeolite films on substrate can be fabricated using in situ synthesis and secondary growth with hydrothermal treatment. Many recent publications show that the secondary growth method favors high reproducibility and good control over the membrane structure [18,21].…”

Section: Inorganic Membranesmentioning

confidence: 99%

“…Although reviews have already been published in the concept of solvent recovery, they are focused on the general aspects [4,16,17,18,19]. The study conducted by Yao et al [16] has highlighted the synthesis of Zeolitic imidazolate framework (ZIF) membranes, thin film formation and their application as pervaporation membranes for dehydration (till the year 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Lately, the synthesis of continuous ZIF-68 membranes on alumina support by reactive seeding was developed by Kasik et al [18]. More recently, ZIFs with higher pore opening materials (largest pore opening of 22.5 Å and the largest cage size of 45.8 Å) were synthesized and tested for the removal of organic mixtures such as octane and p-xylene from humid air [19].…”

Section: Introductionmentioning

confidence: 99%

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Progress and Perspectives on Ceramic Membranes for Solvent Recovery

2019

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With the increase in demand for commodities in the world, it is advisable to conserve resources. In the case of liquid wastes generated from pharmaceutical and petroleum industries, an unconventional solution is provided for the regeneration of solvents. However, this solvent recovery can be carried out using various efficient methods. Recently, Mixed Matrix Membranes (MMM) obtained by the addition of nanoparticles into a polymer matrix as reinforcements, or using a material with a well-defined inorganic network as a membrane like zeolite, silica based, Zeolite imidazolate frameworks (ZIFs) and Metal organic frameworks (MOFs), were explored for a solvent recovery process. These membranes possess characteristics such as high selectivity, flux and stability at various environmental conditions for the solvent recovery process. In this review, we have covered the polymer, nanocomposites, and ceramic membranes for solvent recovery through the pervaporation and organic solvent nanofiltration processes. The key challenges faced by the materials such as MOFs, zeolite, silica, zeolite and ZIFs when they are fabricated (through in situ synthesis or secondary growth process) as membranes and separation of solvents to explore for the solvent recovery process are reviewed.

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“…In addition, the reactive seeds can also be prepared by the conversion of metal source for MOF modified on the surface of substrates. For example, the ZnO can be laid down to substrates via dip-coating [102], in situ deposition [102], manual-rubbing [98], etc. Thereafter, ZnO reacted with ligands to form MOF seeds on the surface of the substrate.…”

Section: Secondary Growthmentioning

confidence: 99%