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Enhanced Sorption o...
Enhanced Sorption of Radionuclides by Defect-Rich Graphene Oxide
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- Boulanger, Nicolas (författare)
- Umeå universitet,Institutionen för fysik
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Kuzenkova, Anastasiia S. (författare)
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- Iakunkov, Artem (författare)
- Umeå universitet,Institutionen för fysik
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Romanchuk, Anna Yu (författare)
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Trigub, Alexander L. (författare)
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Egorov, Alexander, V (författare)
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Bauters, Stephen (författare)
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Amidani, Lucia (författare)
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Retegan, Marius (författare)
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Kvashnina, Kristina O. (författare)
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Kalmykov, Stepan N. (författare)
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- Talyzin, Aleksandr V., 1969- (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- 2020-09-09
- 2020
- Engelska.
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Ingår i: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 12:40, s. 45122-45135
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://pubs.acs.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Extremely defect graphene oxide (dGO) is proposed as an advanced sorbent for treatment of radioactive waste and contaminated natural waters. dGO prepared using a modified Hummers oxidation procedure, starting from reduced graphene oxide (rGO) as a precursor, shows significantly higher sorption of U(VI), Am(III), and Eu(III) than standard graphene oxides (GOs). Earlier studies revealed the mechanism of radionuclide sorption related to defects in GO sheets. Therefore, explosive thermal exfoliation of graphite oxide was used to prepare rGO with a large number of defects and holes. Defects and holes are additionally introduced by Hummers oxidation of rGO, thus providing an extremely defect-rich material. Analysis of characterization by XPS, TGA, and FTIR shows that dGO oxygen functionalization is predominantly related to defects, such as flake edges and edge atoms of holes, whereas standard GO exhibits oxygen functional groups mostly on the planar surface. The high abundance of defects in dGO results in a 15-fold increase in sorption capacity of U(VI) compared to that in standard Hummers GO. The improved sorption capacity of dGO is related to abundant carboxylic group attached hole edge atoms of GO flakes as revealed by synchrotron-based extended X-ray absorption fine structure (EXAFS) and high-energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) spectroscopy.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- graphene oxide
- sorption
- radionuclides
- uranium
- defects
Publikations- och innehållstyp
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- art (ämneskategori)
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Boulanger, Nicol ...
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Kuzenkova, Anast ...
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Iakunkov, Artem
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Romanchuk, Anna ...
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Trigub, Alexande ...
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Egorov, Alexande ...
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visa fler...
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Bauters, Stephen
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Amidani, Lucia
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Retegan, Marius
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Kvashnina, Krist ...
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Kalmykov, Stepan ...
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Talyzin, Aleksan ...
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Materialkemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Den kondenserade ...
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ACS Applied Mate ...
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Umeå universitet