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Ubaldini A, Cicconi F, Rizzo A, Salvi S, Cuzzola V, Gennerini F, Bruni S, Marghella G, Gessi A, Falsini N. Preparation and Characterization of Isostructural Na 2MoO 4 and Na 2WO 4 and a Study of the Composition of Their Mixed System. Molecules 2023; 28:6602. [PMID: 37764377 PMCID: PMC10538176 DOI: 10.3390/molecules28186602] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/01/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
Na2MoO4 and Na2WO4 are isostructural semiconductors, belonging to the spinel class. They have interesting properties and find applications in numerous sectors. These properties can be tuned by controlling the composition of their solid solutions. Here, different methods to obtain these compounds are presented, both wet and solid-state synthesis. The obtained results show a possible dependence of the material properties on the chosen synthesis method. The pure compounds and their mixtures were characterized by Raman spectroscopy, scanning electron microscopy, and X-ray diffraction.
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Affiliation(s)
- Alberto Ubaldini
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Martiri di Monte Sole 4, 40129 Bologna, Italy; (A.R.); (S.B.); (G.M.); (A.G.); (N.F.)
| | - Flavio Cicconi
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), C.R. Brasimone, 40032 Camugnano, Italy; (F.C.); (S.S.); (V.C.)
| | - Antonietta Rizzo
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Martiri di Monte Sole 4, 40129 Bologna, Italy; (A.R.); (S.B.); (G.M.); (A.G.); (N.F.)
| | - Stefano Salvi
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), C.R. Brasimone, 40032 Camugnano, Italy; (F.C.); (S.S.); (V.C.)
| | - Vincenzo Cuzzola
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), C.R. Brasimone, 40032 Camugnano, Italy; (F.C.); (S.S.); (V.C.)
| | - Francesco Gennerini
- Department of Electrical, Electronic and Information Engineering “Guglielmo Marconi” (DEI), Biomedical Engineering, Cesena Campus, Alma Mater Studiorum University of Bologna, Via dell’Università 50, 47522 Cesena, Italy;
| | - Stefania Bruni
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Martiri di Monte Sole 4, 40129 Bologna, Italy; (A.R.); (S.B.); (G.M.); (A.G.); (N.F.)
| | - Giuseppe Marghella
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Martiri di Monte Sole 4, 40129 Bologna, Italy; (A.R.); (S.B.); (G.M.); (A.G.); (N.F.)
| | - Alessandro Gessi
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Martiri di Monte Sole 4, 40129 Bologna, Italy; (A.R.); (S.B.); (G.M.); (A.G.); (N.F.)
| | - Naomi Falsini
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Martiri di Monte Sole 4, 40129 Bologna, Italy; (A.R.); (S.B.); (G.M.); (A.G.); (N.F.)
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Dissolution of Molybdenum in Hydrogen Peroxide: A Thermodynamic, Kinetic and Microscopic Study of a Green Process for 99mTc Production. Molecules 2023; 28:molecules28052090. [PMID: 36903336 PMCID: PMC10004273 DOI: 10.3390/molecules28052090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
99mTc-based radiopharmaceuticals are the most commonly used medical radioactive tracers in nuclear medicine for diagnostic imaging. Due to the expected global shortage of 99Mo, the parent radionuclide from which 99mTc is produced, new production methods should be developed. The SORGENTINA-RF (SRF) project aims at developing a prototypical medium-intensity D-T 14-MeV fusion neutron source specifically designed for production of medical radioisotopes with a focus on 99Mo. The scope of this work was to develop an efficient, cost-effective and green procedure for dissolution of solid molybdenum in hydrogen peroxide solutions compatible for 99mTc production via the SRF neutron source. The dissolution process was extensively studied for two different target geometries: pellets and powder. The first showed better characteristics and properties for the dissolution procedure, and up to 100 g of pellets were successfully dissolved in 250-280 min. The dissolution mechanism on the pellets was investigated by means of scanning electron microscopy and energy-dispersive X-ray spectroscopy. After the procedure, sodium molybdate crystals were characterized via X-ray diffraction, Raman and infrared spectroscopy and the high purity of the compound was established by means of inductively coupled plasma mass spectroscopy. The study confirmed the feasibility of the procedure for production of 99mTc in SRF as it is very cost-effective, with minimal consumption of peroxide and controlled low temperature.
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