Cu-Related Paramagnetic Centers in Cu- and (Cu,Y)-Doped ZrO2 Nanopowders

In this work, we studied Cu-doped and (Cu,Y)-codoped ZrO<sub>2</sub> nanopowders produced through a coprecipitation approach to identify the nature of Cu-related bulk and surface paramagnetic centers. We conducted EPR, NMR, and Raman scattering studies on Cu- and (Cu,Y)-doped ZrO<sub>2</sub> powders calcined at different temperatures. At low calcination temperatures (400 °C) and low Cu loading (0.1-1.0 mol.% of CuO), the EPR signal was found to be attributed to surface-related Cu-H<sub>2</sub>O complexes. For powders with higher Cu content (up to 8.0 mol.% of CuO), the superparamagnetic signal associated with the formation of copper clusters was observed. At higher calcination temperatures, the destruction of Cu-related surface complexes promotes the incorporation of Cu<sup>2+</sup> ions into the bulk of ZrO<sub>2</sub> nanocrystals at Zr positions. Co-doping ZrO<sub>2</sub> with Cu and Y was observed to facilitate the incorporation of Cu<sup>2+</sup> ions into cation sites at lower calcination temperatures when compared with Cu-doped ZrO<sub>2</sub>.

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Publication Details

Journal
Materials
Published
2025-01-29
DOI
https://doi.org/10.3390/ma18030605
Citations
2
Primary Topic
Catalytic Processes in Materials Science
Type
article
Field-Weighted Citation Impact
1.04

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article

Cu-Related Paramagnetic Centers in Cu- and (Cu,Y)-Doped ZrO2 Nanopowders

Yuriy O. Zagorodniy, S. M. Okulov, L. Khomenkova, Volodymyr Trachevskij et al.
2 citations
Materials
Catalytic Processes in Materials Science
1.04
article

Cu-Related Paramagnetic Centers in Cu- and (Cu,Y)-Doped ZrO2 Nanopowders

Yuriy O. Zagorodniy, S. M. Okulov, L. Khomenkova, Volodymyr Trachevskij, Volodymyr Olexsandrovych Yukhymchuk, Sergei A. Kulinich, Valentyna Nosenko, L. Borkovska, Оксана Ісаєва, I. P. Vorona
article en
2 citations

Abstract

In this work, we studied Cu-doped and (Cu,Y)-codoped ZrO<sub>2</sub> nanopowders produced through a coprecipitation approach to identify the nature of Cu-related bulk and surface paramagnetic centers. We conducted EPR, NMR, and Raman scattering studies on Cu- and (Cu,Y)-doped ZrO<sub>2</sub> powders calcined at different temperatures. At low calcination temperatures (400 °C) and low Cu loading (0.1-1.0 mol.% of CuO), the EPR signal was found to be attributed to surface-related Cu-H<sub>2</sub>O complexes. For powders with higher Cu content (up to 8.0 mol.% of CuO), the superparamagnetic signal associated with the formation of copper clusters was observed. At higher calcination temperatures, the destruction of Cu-related surface complexes promotes the incorporation of Cu<sup>2+</sup> ions into the bulk of ZrO<sub>2</sub> nanocrystals at Zr positions. Co-doping ZrO<sub>2</sub> with Cu and Y was observed to facilitate the incorporation of Cu<sup>2+</sup> ions into cation sites at lower calcination temperatures when compared with Cu-doped ZrO<sub>2</sub>.

MaterialsVol. 18(3)
National University of Kyiv-Mohyla Academy (UA), Tokai University (JP), National Academy of Sciences of Ukraine (UA), Frantsevich Institute for Problems in Materials Science (UA), V.E. Lashkaryov Institute of Semiconductor Physics (UA)
National Research Foundation of Ukraine, National Research Foundation, National Academy of Sciences of Ukraine, Amada Foundation
Clean water and sanitation
Openalex Percentile: Top 28%
Catalytic Processes in Materials Science
1.04
DOIOpen Access PDFOpenAlex
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