Effects of Dependence between Solid Solution and Surface Excess in Nanoparticles

Gilberto J. Pereira; Douglas Gouvea

doi:10.4028/www.scientific.net/MSF.660-661.995

Paper Titles

Synthesis Characterization and Sintering of Cobalt-Doped Lanthanum Chromite Powders for Use in SOFCs
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Synthesis of Nickel Oxide - Zirconia Composites by Coprecipitation Route Followed by Hydrothermal Treatment
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Hydrothermal Treatment of Coprecipitated YSZ Powders
p.983

Quantitative Phases Determination of Zirconia Ceramics via Rietveld Method
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Effects of Dependence between Solid Solution and Surface Excess in Nanoparticles
p.995

Use of Sludge as Ceramic Materials
p.1003

Combustion and Pyrolysis of a Sludge Form Wastewater Treatment Plant
p.1009

The Effect of Anionic Sorption on the Metakaolinite
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Comparison of Thermal Analysis, Micro Structural and Compositional of Archeological Indigenous Ceramic (Caninhas Site of Canas - SP) with Actual Clay/Ceramic of Region
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HomeMaterials Science ForumMaterials Science Forum Vols. 660-661Effects of Dependence between Solid Solution and...

Effects of Dependence between Solid Solution and Surface Excess in Nanoparticles

Abstract:

In this work, samples of 10 mol% Mg-doped SnO2 were synthesized by Pechini's method and calcined at 500°C. Previous analysis suggests that the additive is preferentially located on the surface of nanoparticles as a surface excess. Since MgO is highly soluble even in weak acid medium, the samples were "washed" with concentrated nitric acid for a few hours in order to remove Mg from the surface. After the lixiviation, the sample was thermally treated again. This procedure was carried out five times using the same sample, and the dependence between macroscopic properties and surface excess was demonstrated, since it was detected a direct relationship on particle size and isoelectric point on each new washing. Also, a new method to measure surface excess in solids was applied.

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Periodical:

Materials Science Forum (Volumes 660-661)

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995-1000

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https://doi.org/10.4028/www.scientific.net/MSF.660-661.995

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October 2010

Authors:

Gilberto J. Pereira, Douglas Gouvea

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Pechini, Surface Excess, Synthesis

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