Synthesis of highly c-oriented AFI membranes by epitaxial growth

Hu, Enping; Huang, Yi Li Winnie; Yan, Qi; Liu, Dapeng; Lai, Zhiping

doi:10.1016/j.micromeso.2009.05.023

Cited by 24 publications

(17 citation statements)

References 30 publications

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“…[31][32][33][34][35][36][37] Recently, Hedlund and co-workers extended the manual assembly technique to nanocrystals by controlling the humidity of the environment during the coating process. 38 The authors proposed, as shown in Fig.…”

Section: Tsapatsismentioning

confidence: 99%

Zeolite membranes – a review and comparison with MOFs

et al. 2015

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aThe latest developments in zeolite membranes are reviewed, with an emphasis on the synthesis techniques, including seed assembly and secondary growth methods. This review also discusses the current industrial applications of zeolite membranes, the feasibility of their use in membrane reactors and their hydrothermal stability. Finally, zeolite membranes are compared with metal-organic framework (MOF) membranes and the latest advancements in MOF and mixed matrix membranes are highlighted.

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Section: Tsapatsismentioning

confidence: 99%

Zeolite membranes – a review and comparison with MOFs

et al. 2015

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“…Stoeger et al synthesized c-oriented CoSAPO-5 membranes by microwave enhanced growth on TiO 2 -coated porous alumina [26]. We have also reported the synthesis of highly c-oriented AFI membranes on nonporous aluminum substrates [27]. However, in all of these reports either there is no gas permeation data, or the membrane was grown from random oriented seeds so even though the membrane was c-oriented due to competitive growth, its orientation changed gradually along the membrane thickness and therefore disturbed the transport along the straight channels [28].…”

Section: Introductionmentioning

confidence: 52%

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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“…Recently, new progress had been made in fabricating oriented zeolite films in a more elegant way. Lai et al fabricated highly c-oriented AlPO 4 -5 seed monolayers by manual assembly of uniform hexagonal seed plates and synthesized a preferentially c-oriented and continuous AlPO 4 -5 film by optimizing secondary growth conditions [21]. Tsapatsis et al fabricated a c-oriented AlPO 4 -5 film from a sparsely deposited seed layer.…”

Section: Introductionmentioning

confidence: 99%

Effective manipulation of the microstructure of zeolite film by hydrothermal pretreatment

Liu

Yang

2011

J Mater Sci

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Zeolite films with diverse microstructures were prepared from highly regular seed monolayers by accurate manipulation of various synthetic parameters during secondary growth. The effects of the hydrothermal pretreatment procedure, hydrothermal pretreatment temperature and duration, secondary growth temperature and duration of prepared zeolite films on final microstructures were investigated in detail. Based on these results, a mechanism was proposed to elucidate the effects of hydrothermal pretreatment on the secondary growth dynamics of the zeolite films: hydrothermal pretreatment could induce the separation of secondary nucleation and the subsequent growth process. Consequently, the disordered growth of zeolite films could be effectively avoided.

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Synthesis of highly c-oriented AFI membranes by epitaxial growth

Cited by 24 publications

References 30 publications

Zeolite membranes – a review and comparison with MOFs

Zeolite membranes – a review and comparison with MOFs

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

Effective manipulation of the microstructure of zeolite film by hydrothermal pretreatment

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