Thermal stability of porous sol-gel phosphosilicates and their surface area stabilisation by lanthanum addition


The thermal stability of porous sol-gel phosphosilicates was studied by comparing the textural features upon calcination between 400 and 550 °C. A significant loss of surface area and pore volume were observed; the first is due to thermal coarsening of the nanoparticles, and the pore volume reduction was ascribed to sintering of the most external nanoparticles producing less void volume. Lanthanum addition was investigated as thermal stabilizer. For the mesoporous phosphosilicate composition, lanthanum addition enhanced the surface area, showing a 45% and 50% improvement with respect to the La-free counterpart; the effect was much less visible for the macroporous composition.

Publication DOI:
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Energy and Bioproducts Research Institute (EBRI)
Additional Information: © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Supplementary data availalbe on the journal website.
Uncontrolled Keywords: sol-gel,sintering,Lanthanum,thermal stability,phosphosilicate glasses,porous glasses,Materials Science(all),Condensed Matter Physics,Mechanical Engineering,Mechanics of Materials
Publication ISSN: 1873-4979
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2016-09-01
Published Online Date: 2016-04-26
Accepted Date: 2016-04-23
Submitted Date: 2016-01-05
Authors: Falco, Lorena
van den Tempel de Mendonca, Mariana
Mercadal, Juan J.
Zarubina, Valeriya
Melián-Cabrera, Ignacio (ORCID Profile 0000-0002-5132-6743)

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