Radioactive Uranium Preconcentration via Self-Propelled Autonomous Microrobots Based on Metal–Organic Frameworks
| العنوان: | Radioactive Uranium Preconcentration via Self-Propelled Autonomous Microrobots Based on Metal–Organic Frameworks |
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| المؤلفون: | Zdeněk Sofer, Stanislava Matějková, Amir Masoud Pourrahimi, Yulong Ying, Martin Pumera |
| المصدر: | ACS Nano. 13:11477-11487 |
| بيانات النشر: | American Chemical Society (ACS), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Materials science, General Engineering, Oxide, General Physics and Astronomy, Radioactive waste, Nanoparticle, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, Uranium, 010402 general chemistry, 021001 nanoscience & nanotechnology, Platinum nanoparticles, 01 natural sciences, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, chemistry, Imidazolate, General Materials Science, Metal-organic framework, 0210 nano-technology |
| الوصف: | Self-propelled micromachines have recently attracted attention for environmental remediation, yet their use for radioactive waste management has not been addressed. Engineered micromotors that are able to combine highly adsorptive capabilities together with fast autonomous motion in liquid media are promising tools for the removal of nuclear waste, which is one of the most difficult types to manage. Herein, we fabricate self-propelled micromotors based on metal-organic frameworks (MOFs) via template-based interfacial synthesis and show their potential for efficient removal of radioactive uranium. A crucial challenge of the MOF-based motors is their stability in the presence of fuel (hydrogen peroxide) and acidic media. We have ensured their structural stability by Fe doping of zeolitic imidazolate framework-8 (ZIF-8). The implementation of magnetic ferroferric oxide nanoparticles (Fe3O4 NPs) and catalytic platinum nanoparticles (Pt NPs) results in the magnetically responsive and bubble-propelled micromotors. In the presence of 5 wt % H2O2, these micromotors are propelled at a high speed of ca. 860 ± 230 μm·s-1 (i.e., >60 body lengths per second), which is significantly faster than that of other microrod-based motors in the literature. These micromotors demonstrate a highly efficient removal of uranium (96%) from aqueous solution within 1 h, with the subsequent recovery under magnetic control, as well as stable recycling ability and high selectivity. Such self-propelled magnetically recoverable micromotors could find a role in the management and remediation of radioactive waste. |
| تدمد: | 1936-086X 1936-0851 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::6c45136acad7f4a309ff3562c98881ed https://doi.org/10.1021/acsnano.9b04960 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........6c45136acad7f4a309ff3562c98881ed |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 1936086X 19360851 |
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