New insights into the mechanism of graphene oxide and radionuclide interaction
| Autor: | Anastasiia S. Kuzenkova, Carter Kittrell, James M. Tour, Konstantin K. Maslakov, Anna Yu. Romanchuk, Alexander L. Trigub, Stepan N. Kalmykov, Lucia Amidani, Aleksandr V. Talyzin, Kristina O. Kvashnina, Alexander V. Egorov |
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| Rok vydání: | 2020 |
| Předmět: |
Solid-state chemistry
Radionuclide Materials science Graphene Inorganic chemistry Oxide Materialkemi Sorption 02 engineering and technology General Chemistry Condensed Matter Physics 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Materials Chemistry General Materials Science 0210 nano-technology Den kondenserade materiens fysik Mechanism (sociology) |
| Zdroj: | Carbon |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2019.10.003 |
| Popis: | The sorption of U(VI), Am(III)/Eu(III) and Cs(I) radionuclides by graphene oxides (GOs) synthesized byHummers’s, Brodie’s and Tour’s methods was studied through a combination of batch experiments withcharacterization by microscopic and spectroscopic techniques such as X-ray photoelectron spectroscopy(XPS), attenuated total reflection fourier-transform infrared spectroscopy (ATR-FTIR), high-energy resolutionfluorescence detected X-Ray absorption spectroscopy (HERFD-XANES), extended X-ray absorptionfine structure (EXAFS) and high resolution transmission electron microscopy (HRTEM). Remarkablydifferent sorption capacity and affinity of radionuclides was found towards GOs synthesized by Hummers’sand Brodie’s methods reflecting different structure and oxidation state of these materials.Mechanism underlying GO e radionuclide interaction is determined using variety of experimentaltechniques. For the first time it is shown here that GO - radionuclides interaction takes place on the smallholes or vacancy defects in the GO sheets. Mechanism of GO’s interaction with radionuclides wasanalyzed and specific functional groups responsible for this interaction were identified. Therefore, a newstrategy to produce improved materials with high capacity for radionuclides suggests the use perforatedand highly defected GO with a larger proportion of carboxylic functional groups. |
| Databáze: | OpenAIRE |
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