First Synthesis of Uranyl Aluminate nano-particles
Creators
- 1. UMII, ICSM, CEA, CNRS, ENSCM, Ctr Marcoule, UMR 5257, F-30207 Bagnols Sur Ceze (France)
- 2. European Synchrotron Radiat Facil, Rossendorf Beamline CRG BM20, F-38043 Grenoble (France)
- 3. FZD, Inst Radiochem, D-01314 Dresden (Germany)
- 4. CEA Marcoule, DEN, DRCP, Ctr Marcoule, F-30207 Bagnols Sur Ceze (France)
Description
This paper describes, for the first time, a simple method for the synthesis of uranyl aluminate (URAL) nano-particles. URAL was prepared by U(VI) hydrolytic precipitation with ammonia at pH = 11 in the presence of meso-porous alumina MSU-X under 20 kHz of sonication followed by annealing of the obtained solids at 800 C. TEM, XAFS, powder XRD, and 27Al MAS NMR studies revealed that the speciation of uranium in this system strongly depends on uranium concentration. The sample with 5 wt % of uranium yields air-stable nano-particles (similar to 5 nm) of URAL. Presumably, UO22+ cations in this compound are coordinated with bidentate AlO2- groups. The increase of uranium concentration to 30 wt % causes mostly formation of U3O8 fine particles (similar to 50 nm) and small amounts of URAL. (authors)
Availability note (English)
Available from doi: http://dx.doi.org/10.1021/ic100597mAdditional details
Identifiers
- DOI
- 10.1021/ic100597m;
Publishing Information
- Journal Title
- Inorganic Chemistry
- Journal Volume
- 49
- Journal Issue
- no.14
- Journal Page Range
- p. 6381-6383
- ISSN
- 0020-1669
INIS
- Country of Publication
- United States
- Country of Input or Organization
- France
- INIS RN
- 42108303
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- ALUMINATES; AMMONIA; AMORPHOUS STATE; ANNEALING; BOND LENGTHS; CHEMICAL PREPARATION; CONCENTRATION RATIO; HIGH-LEVEL RADIOACTIVE WASTES; HYDROLYSIS; INFRARED SPECTRA; LEAST SQUARE FIT; MONTMORILLONITE; NANOSTRUCTURES; PRECIPITATION; SORPTION; TRANSMISSION ELECTRON MICROSCOPY; URANYL COMPLEXES; X-RAY DIFFRACTION
- Descriptors DEC
- ACTINIDE COMPLEXES; ALUMINIUM COMPOUNDS; CHEMICAL REACTIONS; CLAYS; COHERENT SCATTERING; COMPLEXES; DECOMPOSITION; DIFFRACTION; DIMENSIONLESS NUMBERS; DIMENSIONS; ELECTRON MICROSCOPY; HEAT TREATMENTS; HYDRIDES; HYDROGEN COMPOUNDS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; LENGTH; LYSIS; MATERIALS; MATHEMATICAL SOLUTIONS; MAXIMUM-LIKELIHOOD FIT; MICROSCOPY; MINERALS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; NUMERICAL SOLUTION; OXYGEN COMPOUNDS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; SCATTERING; SEPARATION PROCESSES; SILICATE MINERALS; SOLVOLYSIS; SPECTRA; SYNTHESIS; URANIUM COMPLEXES; WASTES
Optional Information
- Notes
- 10 refs.