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Thermogravimetry applied to characterization of SBA-15 nanostructured material

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Abstract

Nanoporous silica with narrow pore size distribution has attracted increasing attention as a novel material for separations and reactions involving large molecules. SBA-15 has been synthesized in an acidic medium using a triblock copolymer as template. In this work, the SBA-15 was synthesized by the hydrothermal treatment at 373 K for 48 h, of a gel with the following overall molar composition: 1.0TEOS:0.017P123:5.7HCl:193H2O, where TEOS is tetraethyl orthosilicate and P123 is poly(ethylene oxide, propylene oxide and 1,4-dioxane). The obtained material was characterized by thermogravimetry, X-ray diffraction, infrared spectroscopy and BET surface area. A kinetic study using the model free model was accomplished in the stage of decomposition of the template (P123). The obtained value of the apparent activation energy was ca. 131 kJ mol–1.

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Authors and Affiliations

  1. Department of Chemistry, Federal University of Rio Grande do Norte, Natal, Brazil, 59078-970, RN

    Ana Carla S. L. S. Coutinho, Solange A. Quintella, A. S. Araujo, Joana M. F. Barros, Anne M. G. Pedrosa & V. J. Fernandes Jr.

  2. Department of Chemical Engineering, Federal University of Sergipe, São Cristovão, Brazil, 49.000-000, SE

    M. J. B. Souza

Authors
  1. Ana Carla S. L. S. Coutinho
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  2. Solange A. Quintella
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  3. A. S. Araujo
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  4. Joana M. F. Barros
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  5. Anne M. G. Pedrosa
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  6. V. J. Fernandes Jr.
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  7. M. J. B. Souza
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Correspondence to A. S. Araujo.

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Coutinho, A.C.S.L.S., Quintella, S.A., Araujo, A.S. et al. Thermogravimetry applied to characterization of SBA-15 nanostructured material. J Therm Anal Calorim 87, 457–461 (2007). https://doi.org/10.1007/s10973-005-7371-7

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  • DOI: https://doi.org/10.1007/s10973-005-7371-7

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