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Fissuring and Fragmentation Removal During Sol–Gel Catalytic Materials Synthesis: An Experimental Design Approach

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Abstract

Statistical designs were used to investigate the effects of various processing conditions on the fissuring and/or fragmentation of sol–gel catalytic materials. Three types of sol–gel materials were studied: SiO2, TiO2-doped SiO2 and CeO2-doped SiO2. Five processing variables were investigated: the quantity of water included in the sol–gel preparation, the amount of TiO2 or CeO2 precursors, the mixing time, the gelation time and the influence of treatment in an oven at 40∘C prior to the heating treatment (pre-heating time). Processing variables were set at high and low limits in three different 24 full-factorial designs. As notable results, the water content appeared to be a critical processing variable in every studied factorial designs. Pre-heating time was also significant for SiO2 gels. Finally the amount of CeO2 precursor and the gelation time were found to be influential for the synthesis of non-cracked CeO2-doped SiO2 sol–gel monoliths.

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Authors and Affiliations

  1. GEPEA UMR CNRS, 6144, Ecole des Mines de Nantes, 4 rue Alfred Kastler, BP 20722, 44307, Nantes Cedex 3, France

    C. Raillard, V. HÉquet & P. Le Cloirec

  2. GEPEA, UMR CNRS, Université de Nantes, 6144, CRTT, Boulevard de l’Université, BP 406, 44602, Saint-Nazaire Cedex, France

    J. Legrand

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  1. C. Raillard
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  2. V. HÉquet
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  3. P. Le Cloirec
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  4. J. Legrand
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Correspondence to V. HÉquet.

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Raillard, C., HÉquet, V., Le Cloirec, P. et al. Fissuring and Fragmentation Removal During Sol–Gel Catalytic Materials Synthesis: An Experimental Design Approach. J Sol-Gel Sci Technol 34, 5–14 (2005). https://doi.org/10.1007/s10971-005-1257-9

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  • DOI: https://doi.org/10.1007/s10971-005-1257-9

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