Preparation of nanostructured porous SiO2-Al2O3 oxycarbonitride materials obtained by a new chemical precursor method

• Authors: Yordanka Ivanova , Tsvetelina Gerganova , M. Fernandes , Isabel Salvado
• Languages of publication: EN

Abstracts

EN

Nanostructured hybrid materials containing Al2O3 were synthesized via a sol-gel method through hydrolysis and co-condensation reactions using trimethylsilyl isocyanate (TMSI) as a new silica source in the presence of tetramethoxysilane (TMOS) and three different quantities (10, 20 and 30 wt.%) of aluminum sec-butoxide (Al(OBusec)3 as a modifying agent. The xerogel nanostructured materials are pyrolyzed in nitrogen atmosphere in the temperature range from 400°C to 1100°C. The transformation of the xerogel hybrid networks into Al-Si oxycarbonitride materials has been investigated by XRD, FTIR, SEM, AFM, and 29Si MAS-NMR. To the best of our knowledge, the work reported here is the first synthesis of porous di-urethanesils modified with aluminum and one of the few examples of alumosilica oxycarbonitride materials [...]

Keywords

EN

SiO2-Al2O3 ; Sol-gel method; Porous materials; Nanostructured di-urethansils; Oxycarbonitride materials

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2009
• Volume: 7
• Issue: 1
• Pages: 42-46

Dates

published

1 - 3 - 2009

online

23 - 12 - 2008

Contributors

author

Yordanka Ivanova

• Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria

author

Tsvetelina Gerganova

• Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria

author

M. Fernandes

• Ceramic and Glass Engineering Department CICECO, Aveiro University, 3810-193, Aveiro, Portugal

author

Isabel Salvado

• Ceramic and Glass Engineering Department CICECO, Aveiro University, 3810-193, Aveiro, Portugal

References

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Identifiers

DOI

10.2478/s11532-008-0098-0