On the synthesis of CoAPO-46, -11 and -44 molecular sieves from a Co(Ac)2·4H2O·Al(iPrO) 3·H3PO4·Pr 2NH·H2O gel via experimental design

Qiuming Gao; Bert M. Weckhuysen; Robert A. Schoonheydt

doi:10.1016/S1387-1811(98)00274-1

On the synthesis of CoAPO-46, -11 and -44 molecular sieves from a Co(Ac)₂·4H₂O·Al(iPrO) ₃·H₃PO₄·Pr ₂NH·H₂O gel via experimental design

Qiuming Gao, Bert M. Weckhuysen^*, Robert A. Schoonheydt

^*Corresponding author for this work

KU Leuven

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

Abstract

The hydrothermal synthesis of cobalt-substituted microporous alumino-phosphates from an r[Pr₂NH]·[Co_xAl_1-xP₁]O ₄·y[H₂O] gel is described. A well-defined set of experiments, based on an experimental design, was carried out in order to rationalize the influence of the crystallization time/temperature, and r, x and y of the initial gel on the isomorphous substitution of Co²⁺. CoAPO-11, CoAPO-44, CoAPO-46 were the main crystalline materials obtained. These solids were characterized by X-ray diffraction (XRD), thermogravimetrical analysis (TGA), scanning electron microscopy (SEM), electron microscope microprobe analysis (EMMA) and diffuse reflectance spectra (DRS), which resulted in a quantitative model relating the synthesis conditions with the overall crystallinity. In addition, a relation between the overall crystallinity and the degree of isomorphous substitution has been established.

Original language	English
Pages (from-to)	75-86
Number of pages	12
Journal	Microporous and Mesoporous Materials
Volume	27
Issue number	1
DOIs	https://doi.org/10.1016/S1387-1811(98)00274-1
Publication status	Published - Jan 1999
Externally published	Yes

Funding

This work was supported by the Fonds voor Wetenschappelijk Onderzoek (FWO) and the Geconcerteerde onderzoeksacties (GOA) of the Flemish Community. X.G. thanks the Research Council of K.U. Leuven for a junior postdoctoral fellowship, whereas B.M.W. acknowledges the FWO for a postdoctoral fellowship.

Keywords

Cobalt-substituted microporous alumino-phosphates
Crystallinity
Hydrothermal synthesis

Access to Document

10.1016/S1387-1811(98)00274-1

Cite this

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title = "On the synthesis of CoAPO-46, -11 and -44 molecular sieves from a Co(Ac)2·4H2O·Al(iPrO) 3·H3PO4·Pr 2NH·H2O gel via experimental design",

abstract = "The hydrothermal synthesis of cobalt-substituted microporous alumino-phosphates from an r[Pr2NH]·[CoxAl1-xP1]O 4·y[H2O] gel is described. A well-defined set of experiments, based on an experimental design, was carried out in order to rationalize the influence of the crystallization time/temperature, and r, x and y of the initial gel on the isomorphous substitution of Co2+. CoAPO-11, CoAPO-44, CoAPO-46 were the main crystalline materials obtained. These solids were characterized by X-ray diffraction (XRD), thermogravimetrical analysis (TGA), scanning electron microscopy (SEM), electron microscope microprobe analysis (EMMA) and diffuse reflectance spectra (DRS), which resulted in a quantitative model relating the synthesis conditions with the overall crystallinity. In addition, a relation between the overall crystallinity and the degree of isomorphous substitution has been established.",

keywords = "Cobalt-substituted microporous alumino-phosphates, Crystallinity, Hydrothermal synthesis",

author = "Qiuming Gao and Weckhuysen, \{Bert M.\} and Schoonheydt, \{Robert A.\}",

year = "1999",

month = jan,

doi = "10.1016/S1387-1811(98)00274-1",

language = "English",

volume = "27",

pages = "75--86",

journal = "Microporous and Mesoporous Materials",

issn = "1387-1811",

publisher = "Elsevier BV",

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TY - JOUR

T1 - On the synthesis of CoAPO-46, -11 and -44 molecular sieves from a Co(Ac)2·4H2O·Al(iPrO) 3·H3PO4·Pr 2NH·H2O gel via experimental design

AU - Gao, Qiuming

AU - Weckhuysen, Bert M.

AU - Schoonheydt, Robert A.

PY - 1999/1

Y1 - 1999/1

N2 - The hydrothermal synthesis of cobalt-substituted microporous alumino-phosphates from an r[Pr2NH]·[CoxAl1-xP1]O 4·y[H2O] gel is described. A well-defined set of experiments, based on an experimental design, was carried out in order to rationalize the influence of the crystallization time/temperature, and r, x and y of the initial gel on the isomorphous substitution of Co2+. CoAPO-11, CoAPO-44, CoAPO-46 were the main crystalline materials obtained. These solids were characterized by X-ray diffraction (XRD), thermogravimetrical analysis (TGA), scanning electron microscopy (SEM), electron microscope microprobe analysis (EMMA) and diffuse reflectance spectra (DRS), which resulted in a quantitative model relating the synthesis conditions with the overall crystallinity. In addition, a relation between the overall crystallinity and the degree of isomorphous substitution has been established.

AB - The hydrothermal synthesis of cobalt-substituted microporous alumino-phosphates from an r[Pr2NH]·[CoxAl1-xP1]O 4·y[H2O] gel is described. A well-defined set of experiments, based on an experimental design, was carried out in order to rationalize the influence of the crystallization time/temperature, and r, x and y of the initial gel on the isomorphous substitution of Co2+. CoAPO-11, CoAPO-44, CoAPO-46 were the main crystalline materials obtained. These solids were characterized by X-ray diffraction (XRD), thermogravimetrical analysis (TGA), scanning electron microscopy (SEM), electron microscope microprobe analysis (EMMA) and diffuse reflectance spectra (DRS), which resulted in a quantitative model relating the synthesis conditions with the overall crystallinity. In addition, a relation between the overall crystallinity and the degree of isomorphous substitution has been established.

KW - Cobalt-substituted microporous alumino-phosphates

KW - Crystallinity

KW - Hydrothermal synthesis

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U2 - 10.1016/S1387-1811(98)00274-1

DO - 10.1016/S1387-1811(98)00274-1

M3 - Article

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SN - 1387-1811

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EP - 86

JO - Microporous and Mesoporous Materials

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