E-beam and UV induced fabrication of CeO2, Eu2O3 and their mixed oxides with UO2
| Autor: | Vojtěch Vaněček, Tereza Pavelková, Ivo Jakubec, Václav Čuba |
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| Rok vydání: | 2016 |
| Předmět: |
Radiation
Materials science Inorganic chemistry Europium(III) oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Cerium(IV) oxide–cerium(III) oxide cycle Cerium chemistry.chemical_compound chemistry Specific surface area Crystallite Irradiation 0210 nano-technology Europium Cerium(IV) oxide Nuclear chemistry |
| Zdroj: | Radiation Physics and Chemistry. 124:252-257 |
| ISSN: | 0969-806X |
| Popis: | CeO 2 , Eu 2 O 3 and mixed oxides of CeO 2 –UO 2 , Eu 2 O 3 –UO 2 were fabricated. The preparative method was based on the irradiation of aqueous solutions containing cerium/europium (and uranyl) nitrates and ammonium formate. In the course of irradiation, the solid phase (precursor) was precipitated. The composition of irradiated solutions significantly affected the properties of precursor formed in the course of the irradiation. However, subsequent heat treatment of (amorphous) precursors at temperatures ≤650 °C invariably resulted in the formation of powder oxides with well-developed nanocrystals with linear crystallite size 13–27 nm and specific surface area 10–46 m 2 g −1 . The applicability of both ionizing (e-beam) and non-ionizing (UV) radiation was studied. |
| Databáze: | OpenAIRE |
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