Ag(Ag2O)–ZrO2–Y2O3 photosensitive composites: influence of synthesized routes on structure and properties

Gorban, Oksana; Даниленко, И. А.; Gorban, S. I.; Волкова, Г. К.; Glazunova, V. A.; Konstantinova, Tetyana

doi:10.1039/c6pp00196c

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…Besides this approach allows controlling spatial localization of impurities via monitoring of pH factor of solution. This was demonstrated for Cr-doped and Ag-doped Y-stabilized ZrO 2 [41,43].…”

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confidence: 77%

Thermo-stimulated evolution of crystalline structure and dopant distribution in Cu-doped Y-stabilized ZrO₂nanopowders

Korsunska¹,

Polishchuk²,

Kladko³

et al. 2017

Mater. Res. Express

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Nowadays, one of the renewable energy technologies is the development of fuel cells, metal-air batteries and water splitting devices [1-4]. However, most of the materials used for these purposes have low catalytic activity, high cost and low durability. For instance, platinum based catalysts, being the most used for oxygen reduction [4], suffer from high cost and scarcity. However, it was demonstrated that platinum-ruthenium nanoparticles can be uniformly distributed in nitrogen-doped graphene aerogel [1]. These materials exhibit an unprecedented performance towards the methanol electrochemical oxidation reaction and can be directly used as the anode of direct methanol fuel cells by simple physical pressing without the need for any binders or additives [1, 2]. On the other hand, the use of non-noble electro-catalysts becomes more and more attractive [5, 6]. For instance, it was proposed to use carbon-based nanoscale metal-organic frameworks with controllable size and shape as the pyrolytic precursors to achieve high performance of oxygen reduction catalysts [7, 8]. The increasing demand for drinking water causes the development of novel approaches for its production, purification and desalinization [9-11]. In this regard, the application of metal oxide nanoparticles (such as TiO 2 , CeO 2 , Fe 2 O 3 , etc) is attractive. Recently, the graphene-activated metal oxide nanoparticles were used for the capacitive deionization of saline water [9]. Besides, promising catalytic properties were observed for carbon-free ZnS/ ZnO hybrid nanoparticles with graded composition [12]. Metal oxide nanoparticles attract also considerable attention due to their peculiar physical and chemical properties in comparison with ordinary metal oxides. Nanopowders and composites on their basis demonstrate unique

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confidence: 77%

Thermo-stimulated evolution of crystalline structure and dopant distribution in Cu-doped Y-stabilized ZrO₂nanopowders

Korsunska¹,

Polishchuk²,

Kladko³

et al. 2017

Mater. Res. Express

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“…Doping of ZrO 2 with multiple additives (referred to as 'co-doping') becomes more attractive for enhancing catalytic activity. For instance, it has been reported for Y-stabilized ZrO 2 (YSZ) powders doped additionally with Pt [19], Ag [23] or Cu [24][25][26]. It's worth noting that among metallic dopants, copper is more commonly addressed due to its abundance and low cost.…”

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confidence: 99%

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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Facile synthesis of cubic Ag/Ag2O composites and its shape-dependent photo-catalytic activity examination

Song

Wang

et al. 2019

J Mater Sci: Mater Electron

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Ag(Ag2O)–ZrO2–Y2O3 photosensitive composites: influence of synthesized routes on structure and properties

Cited by 5 publications

References 20 publications

Thermo-stimulated evolution of crystalline structure and dopant distribution in Cu-doped Y-stabilized ZrO₂nanopowders

Thermo-stimulated evolution of crystalline structure and dopant distribution in Cu-doped Y-stabilized ZrO₂nanopowders

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

Facile synthesis of cubic Ag/Ag2O composites and its shape-dependent photo-catalytic activity examination

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Ag(Ag2O)–ZrO2–Y2O3 photosensitive composites: influence of synthesized routes on structure and properties

Cited by 5 publications

References 20 publications

Thermo-stimulated evolution of crystalline structure and dopant distribution in Cu-doped Y-stabilized ZrO2nanopowders

Thermo-stimulated evolution of crystalline structure and dopant distribution in Cu-doped Y-stabilized ZrO2nanopowders

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

Facile synthesis of cubic Ag/Ag2O composites and its shape-dependent photo-catalytic activity examination

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Product

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Thermo-stimulated evolution of crystalline structure and dopant distribution in Cu-doped Y-stabilized ZrO₂nanopowders

Thermo-stimulated evolution of crystalline structure and dopant distribution in Cu-doped Y-stabilized ZrO₂nanopowders

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