Solvent-free synthesis of lanthanide oxide and mixed lanthanide oxide nanoparticles
| DWPI Title: Synthesis of lanthanide oxide nanoparticles used as solid electrolyte in sensor, absorber and fuel cell, involves heating at least one lanthanide-tri(methylsilyl)amide precursor at reaction temperature for dwell time |
| Abstract: Lanthanide oxides and mixed lanthanide oxides can be produced using furnace or microwave assisted solid-state synthesis. The use of Ln-tri(methylsilyl)amide-based precursors yields spherical nanoparticles. The formation of spherical shaped nanoparticles is likely due to the preferential single-step decomposition of the Ln-TMS as well as the low activation energy to overcome decomposition. Reaction temperature, initial metal ion ratio, and reaction dwell time can be used to control the final nanoparticle size. The method enables solvent-free, high-yield synthesis of morphology-controlled lanthanide oxides. |
| Use: Synthesis of lanthanide oxide nanoparticles used as solid electrolyte in sensor, absorber and fuel cell. |
| Advantage: The solid-state synthesis can be readily scaled up, easily controlled, and does not need a solvent or washing which make it an attractive option for producing lanthanide oxide nanomaterials. By varying reaction conditions such as the molar ratio of reactants, the reaction temperature, and reaction dwell time, spherical nanoparticles with sizes ranging from 20 nm up to 600 nm can be produced. Solid-state reactions can also be improved upon by utilizing microwave heating. Compared to conventional heating methods, microwave heating is more efficient, has a more homogenous heating profile, and can lead to higher yields. |
| Novelty: Synthesis of lanthanide oxide nanoparticles involves heating at least one lanthanide-tri(methylsilyl)amide precursor at a reaction temperature for a dwell time to produce lanthanide oxide nanoparticles. |
| Filed: 7/28/2021 |
| Application Number: US17387417A |
| Tech ID: SD 15480.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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