Colloidal nanocrystals of zeolite β stabilized in alumina matrix

M. V. Landau; D. Tavor; O. Regev; M. L. Kaliya; M. Herskowitz; V. Valtchev; S. Mintova

doi:10.1021/cm980765u

Colloidal nanocrystals of zeolite β stabilized in alumina matrix

M. V. Landau, D. Tavor, O. Regev, M. L. Kaliya, M. Herskowitz, V. Valtchev, S. Mintova

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

Abstract

Characteristics of zeolite β in stable aqueous colloidal solution were measured by cryo-TEM, DLS, SAXS and after separation from solution by SEM, HR-TEM. Twenty-nanometer spherical zeolite crystals were measured in equilibrium with flocculates. Mixing of colloidal zeolite solution with aluminogel yielded coagulation of both materials. The mass of zeolite adsorbed by aluminogel increased with decreasing pH. After calcination, pellets of the composite material at zeolite loading below 60 wt % contained separated nanocrystals of 10-15-nm zeolite beta; stabilized in the mesopores of alumina matrix. The imbedded zeolite had high structure order and acidity. No blocking of the zeolite micropores in composite materials was detected. The activity of zeolite β nanocrystals (imbedded in alumina matrix) in cumene cracking twice that of bulk nanozeolite clusters.

Original language	English
Pages (from-to)	2030-2037
Number of pages	8
Journal	Chemistry of Materials
Volume	11
Issue number	8
DOIs	https://doi.org/10.1021/cm980765u
State	Published - 1 Jan 1999

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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title = "Colloidal nanocrystals of zeolite β stabilized in alumina matrix",

abstract = "Characteristics of zeolite β in stable aqueous colloidal solution were measured by cryo-TEM, DLS, SAXS and after separation from solution by SEM, HR-TEM. Twenty-nanometer spherical zeolite crystals were measured in equilibrium with flocculates. Mixing of colloidal zeolite solution with aluminogel yielded coagulation of both materials. The mass of zeolite adsorbed by aluminogel increased with decreasing pH. After calcination, pellets of the composite material at zeolite loading below 60 wt % contained separated nanocrystals of 10-15-nm zeolite beta; stabilized in the mesopores of alumina matrix. The imbedded zeolite had high structure order and acidity. No blocking of the zeolite micropores in composite materials was detected. The activity of zeolite β nanocrystals (imbedded in alumina matrix) in cumene cracking twice that of bulk nanozeolite clusters.",

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T1 - Colloidal nanocrystals of zeolite β stabilized in alumina matrix

AU - Landau, M. V.

AU - Tavor, D.

AU - Regev, O.

AU - Kaliya, M. L.

AU - Herskowitz, M.

AU - Valtchev, V.

AU - Mintova, S.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Characteristics of zeolite β in stable aqueous colloidal solution were measured by cryo-TEM, DLS, SAXS and after separation from solution by SEM, HR-TEM. Twenty-nanometer spherical zeolite crystals were measured in equilibrium with flocculates. Mixing of colloidal zeolite solution with aluminogel yielded coagulation of both materials. The mass of zeolite adsorbed by aluminogel increased with decreasing pH. After calcination, pellets of the composite material at zeolite loading below 60 wt % contained separated nanocrystals of 10-15-nm zeolite beta; stabilized in the mesopores of alumina matrix. The imbedded zeolite had high structure order and acidity. No blocking of the zeolite micropores in composite materials was detected. The activity of zeolite β nanocrystals (imbedded in alumina matrix) in cumene cracking twice that of bulk nanozeolite clusters.

AB - Characteristics of zeolite β in stable aqueous colloidal solution were measured by cryo-TEM, DLS, SAXS and after separation from solution by SEM, HR-TEM. Twenty-nanometer spherical zeolite crystals were measured in equilibrium with flocculates. Mixing of colloidal zeolite solution with aluminogel yielded coagulation of both materials. The mass of zeolite adsorbed by aluminogel increased with decreasing pH. After calcination, pellets of the composite material at zeolite loading below 60 wt % contained separated nanocrystals of 10-15-nm zeolite beta; stabilized in the mesopores of alumina matrix. The imbedded zeolite had high structure order and acidity. No blocking of the zeolite micropores in composite materials was detected. The activity of zeolite β nanocrystals (imbedded in alumina matrix) in cumene cracking twice that of bulk nanozeolite clusters.

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JO - Chemistry of Materials

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Colloidal nanocrystals of zeolite β stabilized in alumina matrix

Abstract

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