The peculiarities of light absorption and light emission in Cu-doped Y-stabilized ZrO2 nanopowders

Korsunska, N.; Baran, M.; Papusha, V. P.; Lavoryk, S.; Marchylo, O. M.; Michailovska, Katerina; Melnichuk, L.; Melnichuk, O.; Khomenkova, L.

doi:10.1007/s13204-018-0839-0

Cited by 3 publications

(6 citation statements)

References 31 publications

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“…Because these bands were detected only in Cu doped powders they were attributed to copper ions. 21 Similar bands were observed in copper vapor lasers and were ascribed to intra-defect transitions in Cu 2+ ions. 22 These results allow assuming that these PL components are originated from Cu Zr 2+ centers situated in monoclinic ZrO 2 , and are responsible for EPR signal.…”

Section: B S S Imentioning

confidence: 53%

New Paramagnetic Center in Cu-Doped Y-Stabilized ZrO₂

Vorona

Nosenko

Golub

et al. 2020

ECS J. Solid State Sci. Technol.

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The results of electron paramagnetic resonance (EPR) of Cu-doped Y-stabilized ZrO 2 powders calcined at 800 °C-1000 °C are presented. It was found that the calcination of the samples at high temperatures leads to dramatic modification of EPR spectrum and appearance of new Cu-related signal. Computer simulations of both X-and Q-band spectra allowed to determine the following parameters of the copper centers: S = 1/2, I = 3/2, g x = 2.021, g y = 2.026, g z = 2.168, A xx ∼ 40 × 10 −4 cm −4 , A yy ∼ 35 × 10 −4 cm −4 , A zz ∼ 186 × 10 −4 cm −4 , A xz ∼ 10 × 10 −4 cm −4 , A yz ∼ 5 × 10 −4 cm −4 for the 63 Cu isotope. The analysis of the experimental data allows proposing center model as Cu Zr 2+ in the monoclinic ZrO 2 lattice. The comparison with photoluminescent data allows assumption that EPR center investigated participate in the light emission process.

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Section: B S S Imentioning

confidence: 53%

New Paramagnetic Center in Cu-Doped Y-Stabilized ZrO₂

Vorona

Nosenko

Golub

et al. 2020

ECS J. Solid State Sci. Technol.

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“…The effect of copper content on the properties of catalysts is influenced by the nature of Zr precursor. The comparison of the (Cu,Y)-ZrO 2 powders prepared from ZrOCl 2 •nH 2 O [30] and ZrO(NO 3 ) 2 •nH 2 O salts [15,31] revealed fewer oxygen vacancies in those from ZrOCl 2 •nH 2 O. This was attributed to the simultaneous incorporation of chlorine from the Zr precursor via the formation of Cu-Cl complexes and their integration in Cu-Y-ZrO 2 network during sediments precipitation [15].…”

Section: Introductionmentioning

confidence: 93%

“…In particular, doping with rare-earth ions results in the appearance of intense luminescence in specific spectral ranges [6,13,14]. Doping with copper ions favors the appearance of specific green luminescence [15].…”

Section: Introductionmentioning

confidence: 99%

“…Copper dopants can be introduced in ZrO 2 powders through impregnation [18,19] and chemical precipitation [29], enriching mainly the grain surface or near-surface region by copper. Alternatively, co-precipitation allows for simultaneous Cu presence throughout the volume of the grains and on their surface [7,15,19,30,31].…”

Section: Introductionmentioning

confidence: 99%

“…The comparison of the (Cu,Y)-ZrO 2 powders prepared from ZrOCl 2 •nH 2 O [30] and ZrO(NO 3 ) 2 •nH 2 O salts [15,31] revealed fewer oxygen vacancies in those from ZrOCl 2 •nH 2 O. This was attributed to the simultaneous incorporation of chlorine from the Zr precursor via the formation of Cu-Cl complexes and their integration in Cu-Y-ZrO 2 network during sediments precipitation [15]. An increase of Cu loading leads to the pronounced formation of the Cu-Cl complexes, which act as barriers to the appearance of additional oxygen vacancies because no charge compensation is required for Cu dopant [30].…”

Section: Introductionmentioning

confidence: 99%

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Effect of dopant loading and calcination conditions on structural and optical properties of ZrO₂ nanopowders doped with copper and yttrium

Khomenkova,

Marchylo,

Polishchuk

et al. 2024

Mater. Res. Express

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Undoped, Cu and/or Y doped ZrO2 nanopowders were synthesized with Zr, Y, and Cu nitrates using a co-precipitation approach. Their structural and optical properties were examined regarding dopant content (0.1-8.0 mol.% of CuO and 3-15 mol.% of Y2O3) and calcination conditions (400-1000 °C and, 1, 2 or 5 hours) through Raman scattering, XRD, TEM, EDS, AES, ESR, UV-Vis and FTIR diffused reflectance methods. The results showed that both Cu and Y dopants promoted the appearance of additional oxygen vacancies in ZrO2 host, while the formation of tetragonal and cubic ZrO2 phases was primarily influenced by the Y content, regardless of Cu loading. The bandgap of the most powders was observed within the 5.45-5.65 eV spectral range, while for those with high Y content it exceeded 5.8 eV. The (Cu,Y)-ZrO2 powders with 0.2 mol.% CuO and 3 mol.% Y2O3 calcined at 600°C for 2 hours demonstrated nanoscaled tetragonal grains (8-12 nm) and a significant surface area covered with dispersed CuxO species. For higher calcination temperatures, the formation of CuZr 2+ ESR centers, accompanied by tetragonal-to-monoclinic phase transformation. For fitting experimental FTIR reflection spectra, theoretical models with one, five, and seven oscillators were constructed for cubic, tetragonal, and monoclinic ZrO2 phases, respectively. Compared experimental and theoretical spectra, the parameters of various phonons were determined. It was found that the distinct position of the high-frequency FTIR reflection minimum is a unique feature for each crystalline phase. It centered at 700-720 cm-1, 790-800 cm-1, and 820-840 cm-1 for cubic, tetragonal, and monoclinic phases, respectively, showing minimal dependence on phonon damping coefficients. Based on the complementary nature of results obtained from structural and optical methods, an approach for monitoring powder properties and predicting catalytic activity can be proposed for ZrO2–based nanopowders.

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Study of the evolution of nanopores and microstructural degradation of fine-grained YSZ–NiO(Ni) anode materials in a hydrogen sulfide containing atmosphere

Vasyliv¹,

Kulyk

Duriagina

et al. 2022

Appl Nanosci

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The peculiarities of light absorption and light emission in Cu-doped Y-stabilized ZrO2 nanopowders

Cited by 3 publications

References 31 publications

New Paramagnetic Center in Cu-Doped Y-Stabilized ZrO₂

New Paramagnetic Center in Cu-Doped Y-Stabilized ZrO₂

Effect of dopant loading and calcination conditions on structural and optical properties of ZrO₂ nanopowders doped with copper and yttrium

Study of the evolution of nanopores and microstructural degradation of fine-grained YSZ–NiO(Ni) anode materials in a hydrogen sulfide containing atmosphere

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The peculiarities of light absorption and light emission in Cu-doped Y-stabilized ZrO2 nanopowders

Cited by 3 publications

References 31 publications

New Paramagnetic Center in Cu-Doped Y-Stabilized ZrO2

New Paramagnetic Center in Cu-Doped Y-Stabilized ZrO2

Effect of dopant loading and calcination conditions on structural and optical properties of ZrO2 nanopowders doped with copper and yttrium

Study of the evolution of nanopores and microstructural degradation of fine-grained YSZ–NiO(Ni) anode materials in a hydrogen sulfide containing atmosphere

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Product

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New Paramagnetic Center in Cu-Doped Y-Stabilized ZrO₂

New Paramagnetic Center in Cu-Doped Y-Stabilized ZrO₂

Effect of dopant loading and calcination conditions on structural and optical properties of ZrO₂ nanopowders doped with copper and yttrium