Rapid Synthesis of Mesoporous Molecular Sieve SBA-15 by Different Techniques with Microwave Assistance

Jocielys Jovelino Rodrigues; Ângela da Costa Nogueira; Meiry Gláucia Freire Rodrigues

doi:10.4028/www.scientific.net/MSF.805.684

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HomeMaterials Science ForumMaterials Science Forum Vol. 805Rapid Synthesis of Mesoporous Molecular Sieve...

Rapid Synthesis of Mesoporous Molecular Sieve SBA-15 by Different Techniques with Microwave Assistance

Abstract:

Mesoporous molecular sieves SBA-15 were prepared by using two different procedures taken from the scientific literature. In the first procedure, a hydrogel was prepared with the molar composition: 1.0 TEOS: 0017 P123: 5.7 HCl: 193 H₂O with stirring at 35 °C. In the second procedure a hydrogel was prepared with the molar composition: 1.0 TEOS: 0017 P123: 8.14 HCl: 168 H₂O with stirring at room temperature. In both procedures the samples were synthesized in a microwave. The samples were characterized by X-ray diffraction (XRD), differential thermal analysis (DTA), nitrogen adsorption-desorption analysis, and scanning electron microscopy (SEM). The analysis of XRD and nitrogen adsorption-desorption showed that the samples prepared with stirring at 35°C presented a higher ordering degree, an increase of crystallinity and larger volume of adsorbed nitrogen. The differential thermal analysis reveals that the SBA-15 presented high thermal stability, and the SEM revealed fiber type morphology consistent with this type of material.

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Periodical:

Materials Science Forum (Volume 805)

Pages:

684-689

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.805.684

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Online since:

September 2014

Authors:

Jocielys Jovelino Rodrigues, Ângela da Costa Nogueira, Meiry Gláucia Freire Rodrigues

Keywords:

Microwave, Nitrogen Adsorption-Desorption, SBA-15, Thermal Stability

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