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Aluminium Content

The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform

Baolian Su – 1st expert on this subject based on the ideXlab platform

  • hierarchically structured meso macroporous aluminosilicates with high tetrahedral Aluminium Content in acid catalysed esterification of fatty acids
    Journal of Colloid and Interface Science, 2011
    Co-Authors: Arnaud Lemaire, Baolian Su, Quanyi Wang

    Abstract:

    Hierarchically structured meso-macroporous aluminosilicates with high tetrahedral Aluminium Content in acid catalysed esterification of fatty acids

  • highly spongy hierarchical structured meso macroporous aluminosilicates with high tetrahedral Aluminium Content and 3d interconnectivity from a single source molecular precursor sec buo 2 al o si oet 3 effect of silicon co reactant
    Microporous and Mesoporous Materials, 2011
    Co-Authors: Arnaud Lemaire, Baolian Su

    Abstract:

    Abstract The effect of tetraethoxysilane (TEOS), tetrapropoxysilane (TPOS), tetrabutoxysilane (TBOS) and a mixture of tetramethoxysilane (TMOS) and TEOS as silicon co-reactant on the formation of hierarchically structured meso-macroporous aluminosilicates and the tetrahedral Aluminium Content in the framework using a single molecular alkoxide precursor, (sec-BuO)2–Al–O–Si(OEt)3, has been intensively investigated. The use of alkoxysilane as a co-reactant and highly alkaline media improves the heterocondensation rates between the highly reactive Aluminium-alkoxide part of the single molecular precursor and the added alkoxysilanes, and minimizes the cleavage of the intrinsic Al–O–Si linkage. The very unique hierarchical meso-macroporosity was auto-generated by the hydrodynamic flow of solvents released during the rapid hydrolysis and condensation processes of this double alkoxide and the inorganic silica co-reactant. No external structural agent was required to template these porous structures. The particles obtained featured outstanding macrostructure with regular micrometer-sized macrovoids and displaying 3D interconnections. Importantly, the diameter of the micrometer-sized macrovoids found in the final materials and the thickness of the mesoporous walls separating these voids can be tuned by adjusting the reactivity of alkoxysilanes used as co-reactant. Higher reactivity of alkoxysilanes can improve the tetrahedral Aluminium Content in the meso-macroporous framework and reduce the cleavage of Al–O–Si linkage of the single molecular precursor. These correlations are of primary importance for targeting advanced materials with well defined meso- and macroporosities and tetrahedral Aluminium Content.

Quanyi Wang – 2nd expert on this subject based on the ideXlab platform

  • hierarchically structured meso macroporous aluminosilicates with high tetrahedral Aluminium Content in acid catalysed esterification of fatty acids
    Journal of Colloid and Interface Science, 2011
    Co-Authors: Arnaud Lemaire, Baolian Su, Quanyi Wang

    Abstract:

    Hierarchically structured meso-macroporous aluminosilicates with high tetrahedral Aluminium Content in acid catalysed esterification of fatty acids

Arnaud Lemaire – 3rd expert on this subject based on the ideXlab platform

  • hierarchically structured meso macroporous aluminosilicates with high tetrahedral Aluminium Content in acid catalysed esterification of fatty acids
    Journal of Colloid and Interface Science, 2011
    Co-Authors: Arnaud Lemaire, Baolian Su, Quanyi Wang

    Abstract:

    Hierarchically structured meso-macroporous aluminosilicates with high tetrahedral Aluminium Content in acid catalysed esterification of fatty acids

  • highly spongy hierarchical structured meso macroporous aluminosilicates with high tetrahedral Aluminium Content and 3d interconnectivity from a single source molecular precursor sec buo 2 al o si oet 3 effect of silicon co reactant
    Microporous and Mesoporous Materials, 2011
    Co-Authors: Arnaud Lemaire, Baolian Su

    Abstract:

    Abstract The effect of tetraethoxysilane (TEOS), tetrapropoxysilane (TPOS), tetrabutoxysilane (TBOS) and a mixture of tetramethoxysilane (TMOS) and TEOS as silicon co-reactant on the formation of hierarchically structured meso-macroporous aluminosilicates and the tetrahedral Aluminium Content in the framework using a single molecular alkoxide precursor, (sec-BuO)2–Al–O–Si(OEt)3, has been intensively investigated. The use of alkoxysilane as a co-reactant and highly alkaline media improves the heterocondensation rates between the highly reactive Aluminium-alkoxide part of the single molecular precursor and the added alkoxysilanes, and minimizes the cleavage of the intrinsic Al–O–Si linkage. The very unique hierarchical meso-macroporosity was auto-generated by the hydrodynamic flow of solvents released during the rapid hydrolysis and condensation processes of this double alkoxide and the inorganic silica co-reactant. No external structural agent was required to template these porous structures. The particles obtained featured outstanding macrostructure with regular micrometer-sized macrovoids and displaying 3D interconnections. Importantly, the diameter of the micrometer-sized macrovoids found in the final materials and the thickness of the mesoporous walls separating these voids can be tuned by adjusting the reactivity of alkoxysilanes used as co-reactant. Higher reactivity of alkoxysilanes can improve the tetrahedral Aluminium Content in the meso-macroporous framework and reduce the cleavage of Al–O–Si linkage of the single molecular precursor. These correlations are of primary importance for targeting advanced materials with well defined meso- and macroporosities and tetrahedral Aluminium Content.