Radiation-Assisted Formation of Metal Nanoparticles in Molten Salts
| Autor: | E. T. Dias, Simerjeet K. Gill, Shannon M. Mahurin, William C. Phillips, Sheng Dai, Ruchi Gakhar, Yang Liu, Phillip Halstenberg, Julia Mausz, Anatoly I. Frenkel, Jiahao Huang, Simon M. Pimblott, James F. Wishart |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Metal ions in aqueous solution Nucleation Nanoparticle Ionic bonding 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Solvated electron 01 natural sciences 0104 chemical sciences Metal Chemical engineering visual_art visual_art.visual_art_medium General Materials Science Physical and Theoretical Chemistry Molten salt 0210 nano-technology Absorption (electromagnetic radiation) |
| Zdroj: | The Journal of Physical Chemistry Letters. 12:157-164 |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/acs.jpclett.0c03231 |
| Popis: | Knowledge of structural and thermal properties of molten salts is crucial for understanding and predicting their stability in many applications such as thermal energy storage and nuclear energy systems. Probing the behavior of metal contaminants in molten salts is presently limited to either foreign ionic species or metal nanocrystals added to the melt. To bridge the gap between these two end states and follow the nucleation and growth of metal species in molten salt environment in situ, we use synchrotron X-rays as both a source of solvated electrons for reducing Ni2+ ions added to ZnCl2 melt and as an atomic-level probe for detecting formation of zerovalent Ni nanoparticles. By combining extended X-ray absorption fine structure analysis with X-ray absorption near edge structure modeling, we obtained the average size and structure of the nanoparticles and proposed a radiation-induced reduction mechanism of metal ions in molten salts. |
| Databáze: | OpenAIRE |
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