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Nanostructured gadolinium-doped ceria microsphere synthesis from ion exchange resin: Multi-scale in-situ studies of solid solution formation

Abstract : In the current nano-sized material revolution, the main limitations to a large-scale deployment of nanomaterials involve health concerns related to nano-dissemination via air. Developing new chemical routes benefiting from nano-size advantages while avoiding their hazards could overcome these limitations. Addressing this need, a chemical route leading to soft nano-particle agglomerates, i.e., macroscopic precursors presenting the ability to be decomposed into nano-sized materials, was developed and applied to Ce0.8Gd0.2O2−δ. Using cerium/gadolinium-loaded ion exchange resin, the Ce0.8Gd0.2O2−δ solid solution formation as a function of temperature was studied in-situ through X-ray diffraction, X-ray absorption spectroscopy and Raman spectroscopy. Temperatures corresponding to the organic skeleton decomposition and to the mixed oxide crystallization were identified. An optimal heat treatment, leading to nanostructured soft agglomerates, was established. Microsphere processing capabilities were evaluated and particle size distribution measurements were recorded. A very low fracture strength was calculated, and a nanometric particle size distribution (170 nm) was determined.
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https://hal.umontpellier.fr/hal-01687527
Contributeur : Philippe Falque <>
Soumis le : jeudi 18 janvier 2018 - 15:19:07
Dernière modification le : jeudi 16 septembre 2021 - 12:40:04

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Marie Caisso, Florent Lebreton, Denis Horlait, Sébastien Picart, Philippe Martin, et al.. Nanostructured gadolinium-doped ceria microsphere synthesis from ion exchange resin: Multi-scale in-situ studies of solid solution formation. Journal of Solid State Chemistry, Elsevier, 2014, 218, pp.155 - 163. ⟨10.1016/j.jssc.2014.06.028⟩. ⟨hal-01687527⟩

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