The structure features and morphology of copper-cerium nanopowders obtained by pulse laser ablation | Izvestiya vuzov. Fizika. 2020. № 1. DOI: 10.17223/00213411/63/1/135

The structure features and morphology of copper-cerium nanopowders obtained by pulse laser ablation

Copper-cerium nanopowders CuO _x -CeO₂ (mass ratio Cu: Ce = 6: 100) were prepared by mixing of dispersions of copper and cerium oxides obtained by pulsed laser ablation (PLA) in a liquid followed by drying. Initial dispersions of copper oxides were prepared by PLA using targets of metallic copper in distilled water or in a 1% hydrogen peroxide solution; cerium oxide was prepared by PLA of metallic cerium in distilled water. Nanoparticles of copper oxides of different morphology and composition / structure are formed by ablation of copper in water and hydrogen peroxide aqueous solution. Crystalline phases of copper oxides are not observed in copper-cerium nanopowders obtained from individual dispersions. Copper oxides are distributed as a thin layer on the surface of CeO₂, which is confirmed by high resolution transmission electron microscopy and X-ray diffraction. The formation of the Cu-O-Ce interface induces the formation of defects on the CeO₂ surface, which is confirmed by Raman spectroscopy. A study of the surface composition and charge states of elements for CuO _x nanoparticles and CuO _x -CeO₂ nanopowders was carried out by X-ray photoelectron spectroscopy. The results of the study revealed the r combination of Cu (I) and Cu (II) species with the predominant contribution of the monovalent copper on the surface of CuO _x -CeO₂ nanopowders, which might be a result of the interaction between CuO _x and CeO₂.

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Keywords

оксид меди, медь-цериевые нанопорошки, импульсная лазерная абляция, наночастицы, рентгеновская фотоэлектронная спектроскопия, спектроскопия комбинационного рассеяния, copper oxide, copper-cerium nanopowders, pulsed laser ablation, nanoparticles, X-ray photoelectron spectroscopy, Raman spectroscopy

Authors

Name	Organization	E-mail
Goncharova D.A.	National Research Tomsk State University	dg_va@list.ru
Svintsitskiy D.A.	Boreskov Institute of Catalysis; Novosibirsk State University	sad@catalysis.ru
Stonkus O.A.	Boreskov Institute of Catalysis; Novosibirsk State University	stonkus@catalysis.ru
Svetlichnyi V.A.	National Research Tomsk State University	v_svetlichnyi@bk.ru
Boronin A.I.	Boreskov Institute of Catalysis; Novosibirsk State University	boronin@catalysis.ru

Всего: 5

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