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Synthesis and catalytic application of ceria nanoparticles and ceria-SiC composites

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Abstract

The synthesis of ceria nanoparticles using an inverse microemulsion technique and precipitation method was investigated. Ceria nanoparticles were synthesized by adding diluted ammonia to a microemulsion consisting of n-heptane, Marlophen NP5 and cerium nitrate. The micelle and particle size were adjustable in the range of 5-12nm by varying the molar ratio of water to surfactant and analyzed by dynamic light scattering (DLS), small angle X-ray scattering (SAXS) and high-resolution transmission electron microscopy (HRTEM). After isolation through precipitation, the nanoparticles were subsequently treated at 100-600 °C. The catalytic activity of particles annealed at 400 and 600 °C were tested in soot combustion reactions and characterized by temperature-programmed oxidation (TPO) indicating a size-dependant activity. To prevent the nanoparticles from aggregation, the microemulsion technique was adopted to integrate the nanoparticles homogeneously into a mesoporous SiC matrix through the use of a preceramic polymer. The obtained composite material was also tested in soot combustion reactions.

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Authors and Affiliations

  1. Dresden University of Technology, Mommsenstraße 6, 01062, Dresden, Germany

    Christian Schrage & Stefan Kaskel

  2. Institut de recherches sur la catalyse et l’enviroment de lyon, 2 avenue Albert Einstein, 69626, Villeurbanne cedex, France

    Emanuel Kockrick

Authors
  1. Christian Schrage
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  2. Emanuel Kockrick
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  3. Stefan Kaskel
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Schrage, C., Kockrick, E. & Kaskel, S. Synthesis and catalytic application of ceria nanoparticles and ceria-SiC composites. MRS Online Proceedings Library 1217, 907 (2009). https://doi.org/10.1557/PROC-1217-Y09-07

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  • DOI: https://doi.org/10.1557/PROC-1217-Y09-07

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