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Amorphous nanostructured composites Al2O3:nC with enhanced sorption affinity to La(III), Ce(III), U(VI) ions in aqueous solution

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Tarakina,  Nadezda V.
Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Krasil'nikov, V., Baklanova, I., Polyakov, E., Volkov, I., Khlebnikov, A., Tyutyunnik, A., et al. (2022). Amorphous nanostructured composites Al2O3:nC with enhanced sorption affinity to La(III), Ce(III), U(VI) ions in aqueous solution. Inorganic Chemistry Communications, 138: 109313. doi:10.1016/j.inoche.2022.109313.


Cite as: http://hdl.handle.net/21.11116/0000-000A-0A00-B
Abstract
The nanostructured AlO3:nC composites with enhanced chemical activity and higher solubility of oxide in acids have been synthesized. For the synthesis, an organometallic precursor, produced by thermal treatment of a mixture of Al(NO3)3·9H2O with ethylene glycol, was heated in helium atmosphere at 700–1100 °C. X-ray powder diffraction, selected-area electron diffraction and transmission electron microscopy revealed the formation of a homogeneous amorphous mass with indistinguishable boundaries between the oxide and carbon components at 700–1000 °C, while annealing at 1100 °C provoked the crystallization of γ-AlO3 nanoparticles, forming a clear AlO3/carbon interface. This specific microstructure provides a high sorption affinity of the composite for La (III), Ce (III), U (VI) ions in aqueous solutions, which is significantly higher than that of microcrystalline aluminum oxides.