Microporous SiO2 and SiO2/MOx (M=Ti, Zr, Al) for ceramic membrane applications: A microstructural study of the sol-stage and the consolidated state

R.S.A. de Lange; K-N.P. Kumar; J.H.A. Hekkink; G.M.H. van de Velde; K. Keizer; A.J. Burggraaf; W.H. Dokter; H.F. van Garderen; T.P.M. Beelen

doi:10.1007/BF00486296

Microporous SiO₂ and SiO₂/MO_x (M=Ti, Zr, Al) for ceramic membrane applications: A microstructural study of the sol-stage and the consolidated state

R.S.A. de Lange^*, K-N.P. Kumar, J.H.A. Hekkink, G.M.H. van de Velde, K. Keizer, A.J. Burggraaf, W.H. Dokter, H.F. van Garderen, T.P.M. Beelen

^*Corresponding author for this work

Inorganic Materials Science

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Abstract

Microporous SiO₂ and SiO₂/MO₂ (M=Ti, Zr, Al; 10 mol% MO_x) materials for gas separation membrane applications have been prepared from polymeric sols. Characterization of these sols with SAXS showed that the mean fractal dimension of the SiO₂ sols is 1.3-1.4 with a radius of gyration of approximately 2.5 nm. The dried and calcined films are microporous and the pore size distribution was bimodal with maxima at diameters of 0.5 nm and 0.75 nm. For the SiO₂/TiO₂, SiO₂/ZrO₂ and SiO₂/Al₂O₃ systems, much milder reaction conditions proved to be necessary to obtain sols with comparable fractal dimensions due to the high reactivity of the Ti/Zr/Al-alkoxides. Microporous supported membranes with molecular sieve-like gas transport properties can be prepared from a relatively wide range of sol structures: from polymers too small to characterize with SAXS to structures with fractal dimensions: 1<d_f<2.04.

Original language	English
Pages (from-to)	489-495
Number of pages	7
Journal	Journal of sol-gel science and technology
Volume	2
Issue number	1-3
DOIs	https://doi.org/10.1007/BF00486296
Publication status	Published - 1994

Keywords

Ceramic membrane
Gas separation
Microporous
Microstructure
SiO

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de Lange, R. S. A., Kumar, K.-NP., Hekkink, J. H. A., van de Velde, G. M. H., Keizer, K., Burggraaf, A. J., Dokter, W. H., van Garderen, H. F., & Beelen, T. P. M. (1994). Microporous SiO₂ and SiO₂/MO_x (M=Ti, Zr, Al) for ceramic membrane applications: A microstructural study of the sol-stage and the consolidated state. Journal of sol-gel science and technology, 2(1-3), 489-495. https://doi.org/10.1007/BF00486296

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abstract = "Microporous SiO2 and SiO2/MO2 (M=Ti, Zr, Al; 10 mol% MOx) materials for gas separation membrane applications have been prepared from polymeric sols. Characterization of these sols with SAXS showed that the mean fractal dimension of the SiO2 sols is 1.3-1.4 with a radius of gyration of approximately 2.5 nm. The dried and calcined films are microporous and the pore size distribution was bimodal with maxima at diameters of 0.5 nm and 0.75 nm. For the SiO2/TiO2, SiO2/ZrO2 and SiO2/Al2O3 systems, much milder reaction conditions proved to be necessary to obtain sols with comparable fractal dimensions due to the high reactivity of the Ti/Zr/Al-alkoxides. Microporous supported membranes with molecular sieve-like gas transport properties can be prepared from a relatively wide range of sol structures: from polymers too small to characterize with SAXS to structures with fractal dimensions: 1f<2.04.",

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author = "{de Lange}, R.S.A. and K-N.P. Kumar and J.H.A. Hekkink and {van de Velde}, G.M.H. and K. Keizer and A.J. Burggraaf and W.H. Dokter and {van Garderen}, H.F. and T.P.M. Beelen",

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de Lange, RSA, Kumar, K-NP, Hekkink, JHA, van de Velde, GMH, Keizer, K, Burggraaf, AJ, Dokter, WH, van Garderen, HF & Beelen, TPM 1994, 'Microporous SiO₂ and SiO₂/MO_x (M=Ti, Zr, Al) for ceramic membrane applications: A microstructural study of the sol-stage and the consolidated state', Journal of sol-gel science and technology, vol. 2, no. 1-3, pp. 489-495. https://doi.org/10.1007/BF00486296

TY - JOUR

T1 - Microporous SiO2 and SiO2/MOx (M=Ti, Zr, Al) for ceramic membrane applications

T2 - A microstructural study of the sol-stage and the consolidated state

AU - de Lange, R.S.A.

AU - Kumar, K-N.P.

AU - Hekkink, J.H.A.

AU - van de Velde, G.M.H.

AU - Keizer, K.

AU - Burggraaf, A.J.

AU - Dokter, W.H.

AU - van Garderen, H.F.

AU - Beelen, T.P.M.

PY - 1994

Y1 - 1994

N2 - Microporous SiO2 and SiO2/MO2 (M=Ti, Zr, Al; 10 mol% MOx) materials for gas separation membrane applications have been prepared from polymeric sols. Characterization of these sols with SAXS showed that the mean fractal dimension of the SiO2 sols is 1.3-1.4 with a radius of gyration of approximately 2.5 nm. The dried and calcined films are microporous and the pore size distribution was bimodal with maxima at diameters of 0.5 nm and 0.75 nm. For the SiO2/TiO2, SiO2/ZrO2 and SiO2/Al2O3 systems, much milder reaction conditions proved to be necessary to obtain sols with comparable fractal dimensions due to the high reactivity of the Ti/Zr/Al-alkoxides. Microporous supported membranes with molecular sieve-like gas transport properties can be prepared from a relatively wide range of sol structures: from polymers too small to characterize with SAXS to structures with fractal dimensions: 1f<2.04.

AB - Microporous SiO2 and SiO2/MO2 (M=Ti, Zr, Al; 10 mol% MOx) materials for gas separation membrane applications have been prepared from polymeric sols. Characterization of these sols with SAXS showed that the mean fractal dimension of the SiO2 sols is 1.3-1.4 with a radius of gyration of approximately 2.5 nm. The dried and calcined films are microporous and the pore size distribution was bimodal with maxima at diameters of 0.5 nm and 0.75 nm. For the SiO2/TiO2, SiO2/ZrO2 and SiO2/Al2O3 systems, much milder reaction conditions proved to be necessary to obtain sols with comparable fractal dimensions due to the high reactivity of the Ti/Zr/Al-alkoxides. Microporous supported membranes with molecular sieve-like gas transport properties can be prepared from a relatively wide range of sol structures: from polymers too small to characterize with SAXS to structures with fractal dimensions: 1f<2.04.

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KW - Gas separation

KW - Microporous

KW - Microstructure

KW - SiO

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IS - 1-3

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Microporous SiO₂ and SiO₂/MO_x (M=Ti, Zr, Al) for ceramic membrane applications: A microstructural study of the sol-stage and the consolidated state

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