Synthesis of size-controlled UO2 microspheres from the hydrothermal conversion of U(IV) aspartate
| Autor: | Jérémie Manaud, Renaud Podor, Jérôme Maynadié, V. Trillaud, J. Hidalgo, Daniel Meyer, Nicolas Dacheux, Nicolas Clavier |
|---|---|
| Přispěvatelé: | Interfaces de Matériaux en Evolution (LIME), Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Systèmes HYbrides pour la Séparation (LHyS), Etude de la Matière en Mode Environnemental (L2ME), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
hydrothermal
Morphology (linguistics) Materials science Dispersity nuclear safeguards chemistry.chemical_element 02 engineering and technology [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 01 natural sciences Hydrothermal circulation Microsphere General Materials Science conversion General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry Uranium 021001 nanoscience & nanotechnology Condensed Matter Physics Uranium oxide 0104 chemical sciences chemistry Chemical engineering Particle diameter microsphere 0210 nano-technology Dispersion (chemistry) [CHIM.RADIO]Chemical Sciences/Radiochemistry Wet chemistry |
| Zdroj: | CrystEngComm CrystEngComm, 2018, 20 (48), pp.7749-7760. ⟨10.1039/C8CE01352G⟩ CrystEngComm, Royal Society of Chemistry, 2018, 20 (48), pp.7749-7760. ⟨10.1039/C8CE01352G⟩ |
| ISSN: | 1466-8033 |
| Popis: | International audience; A simple wet chemistry route towards micrometric spherical UO2 particles was designed through the conversion of uranium(IV) aspartate under mild hydrothermal conditions (T = 160 °C). A multiparametric study examining the effects of hydrothermal treatment duration, the initial uranium/aspartic acid molar ratio and magnetic stirring allowed us to point out the role of organic species in the shaping of the particles and to specify the operating conditions leading to monodisperse and size-controlled particles. In a turbulent flow regime (i.e. Rea > 104), particles with a diameter ranging from 400 nm to 2500 nm were obtained with a typical dispersion of less than ±10%. Moreover, the protocol was found to be robust and reproducible, with only limited size variation from one batch to another (typically less than ±5% on the particle diameter). The effect of an additional heat treatment step was also investigated which showed that residual traces of water and organics can be removed after firing at 600 °C without altering the initial morphology. This wet chemistry route appears to be very promising for the production of spherical UO2 particles and can be simply implemented in any nuclear chemistry lab, which paves the way to applications of such materials in various scientific areas. |
| Databáze: | OpenAIRE |
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