Spheres of Microporous Titanosilicate Umbite with Hierarchical Pore Systems

Authors

  • Víctor Sebastián,

    1. Department of Chemical and Environmental Engineering, Nanoscience Institute of Aragon, University of Zaragoza, María de Luna, 3. 50018 Zaragoza (Spain)
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  • Isabel Díaz,

    1. Instituto de Catálisis y Petroleoquímica (CSIC), 28049 Madrid (Spain)
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  • Carlos Téllez,

    1. Department of Chemical and Environmental Engineering, Nanoscience Institute of Aragon, University of Zaragoza, María de Luna, 3. 50018 Zaragoza (Spain)
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  • Joaquín Coronas,

    Corresponding author
    1. Department of Chemical and Environmental Engineering, Nanoscience Institute of Aragon, University of Zaragoza, María de Luna, 3. 50018 Zaragoza (Spain)
    • Department of Chemical and Environmental Engineering, Nanoscience Institute of Aragon, University of Zaragoza, María de Luna, 3. 50018 Zaragoza (Spain).===

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  • Jesús Santamaría

    1. Department of Chemical and Environmental Engineering, Nanoscience Institute of Aragon, University of Zaragoza, María de Luna, 3. 50018 Zaragoza (Spain)
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  • Financing from the Spanish Ministry of Education and Science (MAT2004-02184) is gratefully acknowledged. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

Micrometric polycrystalline spheres of up to 1 mm diameter of microporous titanosilicate K2TiSi3O9·H2O with umbite structure have been prepared without the use of organic structuring agents. These spheres are organized as micro/macroporous hierarchical materials with macropores in the 0.2–1.4 µm range of average size, showing that intraparticular resistance to water transport is not limiting. Also, similar ion exchange performance can be observed in the Ti-umbite spheres and in the single crystals obtained under the same synthesis conditions.

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