Journal Article10.1023/A:1009614525012
Control of the preferred orientation in MFI films synthesized by seeding
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TL;DR: In this article, the preferred orientation of the crystals constituting the films as a function of the amount and size of seeds, film thickness and hydrothermal treatment conditions was investigated and a film growth mechanism which is able to explain the experimental results was proposed.
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Abstract: Single crystal silicon and quartz wafers were seeded with colloidal TPA-silicalite-1 crystals. Hydrothermal treatment of the seeded substrates was used to grow dense MFI films. The preferred orientation of the crystals constituting the films as a function of the amount and size of seeds, film thickness and hydrothermal treatment conditions was investigated. In thin films, most of the crystalline material was found to be oriented with the b-axes close to perpendicular to the substrate surface. In thick films, the a- or c-axes were close to perpendicular to the substrate surface depending on the conditions used for hydrothermal treatment. The seed size and amount was found to affect the rate of change in preferred orientation as a function of film thickness. A film growth mechanism which is able to explain the experimental results is proposed.
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Citations
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Simulations and experiments on the growth and microstructure of zeolite MFI films and membranes made by secondary growth
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Comparison of the evolution and growth processes of films of M/Al-layered double hydroxides with M = Ni or Zn
TL;DR: In this article, two different growth mechanisms, homogeneous nucleation and heterogenous nucleation, have been proposed in order to account for the different growth processes of Ni/Al-LDH and Zn/Al -LDH films, respectively.
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Structured zeolite NaX coatings on ceramic cordierite monolith supports for PSA applications
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Stability of oriented silicalite-1 films in view of zeolite membrane preparation
M.J. den Exter,H. van Bekkum,C.J.M. Rijn,Freek Kapteijn,Jacob A. Moulijn,H. Schellevis,C.I.N. Beenakker +6 more
TL;DR: In this article, b-and (a, b)-oriented monolayers on silicon wafers were grown as b- and b-oriented mono-layer on silicon and silicon nitride windows, aiming at two new membrane systems.
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Growth model of oriented crystals of zeolite Si-ZSM-5
TL;DR: In this article, a model for the growth of Si-ZSM-5 (silicalite-1) crystals from zeolite synthesis mixtures is proposed, where nucleation and crystal growth occur at the interface of gel particles and liquid, where both the silicon source and template are present in abundance.
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Preparation and characterization of hollow fibers of silicalite-1
TL;DR: Hollow fibers consisting solely of silicalite-1 were prepared by a novel method consisting of four basic steps as mentioned in this paper, in which carbon fibers were first surface modified to facilitate adsorption of colloidal seed crystals of Silicalite 1. Such particles were then adsorbed as a monolayer on the fiber surface and induced to grow into a continuous film of intergrown crystals of S 1.
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