Synthesis of Oriented Zeolite Membranes at the Interface between Two Fluid Phases

Tricoli, Vincenzo; Šefčı́k, Ján; McCormick, Alon V.

doi:10.1021/la962095h

Cited by 14 publications

(6 citation statements)

References 35 publications

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“…Schu ¨th, Fowler and others grew zeolite structures or silica spheres at such interfaces, but failed to generate structures with defined pore sizes and size distribution. [24][25][26][27][28] Pore size control in microparticle colloidal assemblies were reported by Dinsmore et al, using assembly of the particles at fluid interfaces, followed by sintering. The resulting interstices of the quasi-hexagonal array of particles gave pores in the range of several hundred nanometers.…”

Section: Nanoparticles As Building Blocksmentioning

confidence: 94%

Self-assembly of nanoparticles at interfaces

et al. 2007

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Developments in the assembly of nanoparticles at liquid-liquid interfaces are reviewed where the assemblies can be controlled by tuning the size of the nanoparticles and the chemical characteristics of the ligands. Both synthetic and biological nanoparticles are discussed. By controlling the type of ligands, uniform and Janus-type nanoparticles can be produced where, at liquid-liquid interfaces, subsequent reactions of the ligands can be used to generate crosslinked sheets of nanoparticles at the interface that have applications including novel encapsulants, filtration devices with well-defined porosities, and controlled release materials. By controlling the size and volume fraction of the nanoparticles and the chemical nature of the ligands, nanoparticle-polymer composites can be generated where either enthalpy or entropy can be used to control the spatial distribution of the nanoparticles, thereby, producing auto-responsive materials that self-heal, self-corral assemblies of nanoparticles, or self-direct morphologies. Such systems hold great promise for generating novel optical, acoustic, electronic and magnetic materials.

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Section: Nanoparticles As Building Blocksmentioning

confidence: 94%

Self-assembly of nanoparticles at interfaces

et al. 2007

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“…For a b-oriented ZSM-5 membrane, such issues still remain an open question. b-Oriented ZSM-5 membranes have been reported by Jansen et al, [27] Yan et al, [28] Tricoli et al [29] and Wang et al, [10,30,31] however no permeation data was reported for these membranes.…”

Section: Full Papermentioning

confidence: 96%

Siliceous ZSM‐5 Membranes by Secondary Growth of b‐Oriented Seed Layers

Lai

Tsapatsis²,

Nicolich

2004

Adv Funct Materials

255

163

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A modified seeded growth procedure, which allowed us to prepare the first functional b‐oriented siliceous ZSM‐5 membrane (Z. Lai et al., Science, 2003, 300, 456), is described and discussed in detail. The procedure involves growing a b‐oriented ZSM‐5 seed monolayer into a dense b‐oriented membrane. Preservation of the orientation is achieved by enhancing the growth rate of siliceous ZSM‐5 crystals along the b‐axis using trimer‐TPAOH (bis‐N,N‐(tripropylammoniumhexamethylene) di‐N,N‐propylammonium trihydroxide) as the structure‐directing agent (SDA). Under similar synthesis conditions but using monomer‐TPAOH (tetrapropylammonium hydroxide) as the SDA for the secondary growth of the b‐oriented seed layer, two other films with mixed grain orientations, namely b&a‐ or b&a&h0h/c‐oriented ZSM‐5 membranes were obtained depending on temperature of the secondary growth. Membrane microstructures were characterized by X‐ray diffraction, pole figure analysis, scanning electron microscopy, fluorescent confocal optical microscopy, electron probe microanalysis, and X‐ray photoelectron spectroscopy. The separation performance of the three types of membranes was tested by using a mixture of xylene isomers. Significant improvement in both permeance and separation factor is achieved by the b‐oriented siliceous ZSM‐5 membrane compared to the other two types of membranes described here or other reported ZSM‐5 membranes in the literature. The permeation results indicate that the membrane performance depends strongly on membrane microstructure.

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“…to the surface of the support. Tricoli et al 1997 developed self-standing silicalite-1 films by a hydrothermal method on Ž . an air᎐water interface, to which the 0k0 axis was orthogo-Ž .…”

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confidence: 99%