Evolution of porous structure and texture in nanoporous SiO2/Al2O3 materials during calcination

Elena A. Glazkova, Olga V. Bakina

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The study focuses on the evolution of porous structure and texture of silica/alumina xerogels during calcination in the temperature range from 500 to 1200°C. The xerogel was prepared via sol-gel method using subcritical drying. The silica/alumina xerogels were examined using transmission electron microscopy-energy dispersive spectroscopy (TEM-EDS), Brunauer Emmett Teller-Barrett Joyner Halenda (BET-BJH), differential scanning calorimetry (DSC), and Fourier transform infrared (FTIR) spectroscopy. SiO2 primary particles of size about 10 nm are connected with each other to form a porous xerogel structure. Alumina is uniformly distributed over the xerogel volume. The changes of textural characteristics under heat treatment of samples are radical; the specific surface area and pore size attain their maximum at 500-700°C. The heat treatment of samples causes dehydroxylation of the xerogel surface, and at 1200°C the sample is sintered, loses mesoporosity, and its specific surface area reduces considerably down to 78 m2/g.

    Original languageEnglish
    Title of host publicationAdvanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
    PublisherAmerican Institute of Physics Inc.
    Volume1783
    ISBN (Electronic)9780735414457
    DOIs
    Publication statusPublished - 10 Nov 2016
    EventInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016 - Tomsk, Russian Federation
    Duration: 19 Sep 201623 Sep 2016

    Conference

    ConferenceInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
    CountryRussian Federation
    CityTomsk
    Period19.9.1623.9.16

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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  • Cite this

    Glazkova, E. A., & Bakina, O. V. (2016). Evolution of porous structure and texture in nanoporous SiO2/Al2O3 materials during calcination. In Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016 (Vol. 1783). [020061] American Institute of Physics Inc.. https://doi.org/10.1063/1.4966354