High photocatalytic activity of aerogel tetragonal and monoclinic ZrO2 samples

Sakfali, Jamila; Chaabene, Semy Ben; Akkari, R.; Dappozze, F.; Berhault, Gilles; Guillard, C.; Zina, Mongia Saïd

doi:10.1016/j.jphotochem.2022.113970

Cited by 24 publications

(13 citation statements)

References 76 publications

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“…The phase transition and, possibly, lattice distortion explain the higher O III contribution at 840 °C. [81] In accordance with our XPS results, Zr 4þ and uncoordinated Zr species (i.e., Zr (4Àx)þ ) have been observed in ZrO 2 treated at 600, 840, and 1200 °C (Figure 5a), which points to the possible presence of cationic Frenkel pairs. [82] The presence of uncoordinated species can lead to defect formation.…”

Section: Determination Of the Element Oxidation Statesupporting

confidence: 90%

Additive Manufacturing of Zn‐Doped ZrO₂Architectures

Winczewski,

Arriaga‐Dávila,

Maestre

et al. 2024

Adv Eng Mater

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Tailoring the properties of microfabricated ceramics through doping can unlock new avenues for the additive manufacturing (AM) of advanced three‐dimensional (3D) architectures. The first step to achieving optical functionality is to control material morphology, crystallinity, and defects associated with the composition of the produced AM architecture and dopants. For this purpose, AM of zinc‐doped zirconia (ZrO2:Zn) 3D microarchitectures are proposed using two‐photon lithography and tailor‐made resin. It is found that Zn doping modulates ZrO2:Zn architecture crystallinity and optical properties. The modification of optical properties through Zn doping is confirmed by micro‐photoluminescence, where higher energy photon emission is observed due to the promotion of oxygen vacancies and surface defects. It is also shown that Zn 2.5% and 5 wt.% stabilizes the monoclinic ZrO2 at a lower temperature than in the case of undoped ZrO2. Furthermore, we have evidence that Zn tends to form ZnO wurtzite, which is later sublimated. Our findings provide a promising route to understand the role of defects ZrO2:Zn optically upon annealing.This article is protected by copyright. All rights reserved.

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Section: Determination Of the Element Oxidation Statesupporting

confidence: 90%

Additive Manufacturing of Zn‐Doped ZrO₂Architectures

Winczewski,

Arriaga‐Dávila,

Maestre

et al. 2024

Adv Eng Mater

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“…5(b)). 41,42 Thus, the Raman spectra also confirm the coexistence of tetragonal and monoclinic phases of ZrO 2 in the PZ4 nanocomposite film.…”

Section: Pccp Papermentioning

confidence: 59%

“…Suffixes are used to indicate the contributing elements associated with the MWS relaxation in the polycrystalline system. 42,71 In terms of R E , R G , R GB , C G , and C GB , the real and imaginary part of the complex impedance can be written as follows.In the Nyquist plot of the impedance spectra, the diameter of the semicircular arc is a measure of the grains, grain boundaries, and electrode-grain interface resistances ( R G , R GB , and R E ). The arc's radius reduces sequentially with increasing temperature and doping concentration.…”

Section: Resultsmentioning

confidence: 99%

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Tunable, reversible resistive switching behavior of PVA-zirconia nanocomposite films and validation of the trap-assisted switching mechanism by the selective application of external bias voltages

Karmakar

Das

Dutta

et al. 2023

Phys. Chem. Chem. Phys.

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“…And Ga, Sn, Y, Al, and Zr elements are present in the valence state of + 3, + 2, + 3, + 3, and + 4, respectively. [24][25][26][27][28][29][30] Apart from the characterization of the prepared HEO-CNFs, bare Zn was also subjected to basic XRD and SEM tests (Figure S14, Supporting Information). Bare Zn may serve as a comparative experimental sample in the subsequent experiments to investigate the material proper-ties and performance compared with the electrodes protected by HEO-CNFs.…”

Section: Structural and Compositional Analysis Of Heo-cnfs Anodementioning

confidence: 99%

Successive Gradient Internal Electric Field Strategy Toward Dendrite‐Free Zinc Metal Anode

Li,

Jia,

Ali

et al. 2023

Advanced Energy Materials

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With the rapidly increasing demand for grid‐scale energy storage systems, rechargeable aqueous zinc ion batteries (ZIBs) are capturing attention as a highly promising technology with low cost and high safety. Nevertheless, rampant dendrite growth, hydrogen evolution reaction (HER), and corrosion of the zinc anode have dramatically impacted their practical application. Here, a self‐supported modified layer with ultrafine high‐entropy nanoparticles (2 nm) as the zincophilic sites is realized to modify the Zn anode for the first time. High‐entropy materials with unique continuously distributed potential gaps significantly reduce the activation energy of multi‐electron reactions and modulate ion transport during zinc deposition. Moreover, thanks to the hydrophobic properties and effective desolventizing ability of the ultrafine high‐entropy nanomaterial, the unfavorable side reactions of the zinc anode are prevented to promote the zinc deposition process. As a result, stable cycling of 3500 h at 1 mA cm−2 and 600 h at a high current density of 10 mA cm−2 is achieved. Coin cells and flexible pouch cells assembled with KMO and NH4V4O10 cathodes also demonstrate promoted electrochemical performance. The dual effects of accelerating and homogenizing mechanisms in high‐entropy materials provide a new strategy for stabilizing zinc metal anodes.

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High photocatalytic activity of aerogel tetragonal and monoclinic ZrO2 samples

Cited by 24 publications

References 76 publications

Additive Manufacturing of Zn‐Doped ZrO₂Architectures

Additive Manufacturing of Zn‐Doped ZrO₂Architectures

Tunable, reversible resistive switching behavior of PVA-zirconia nanocomposite films and validation of the trap-assisted switching mechanism by the selective application of external bias voltages

Successive Gradient Internal Electric Field Strategy Toward Dendrite‐Free Zinc Metal Anode

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High photocatalytic activity of aerogel tetragonal and monoclinic ZrO2 samples

Cited by 24 publications

References 76 publications

Additive Manufacturing of Zn‐Doped ZrO2Architectures

Additive Manufacturing of Zn‐Doped ZrO2Architectures

Tunable, reversible resistive switching behavior of PVA-zirconia nanocomposite films and validation of the trap-assisted switching mechanism by the selective application of external bias voltages

Successive Gradient Internal Electric Field Strategy Toward Dendrite‐Free Zinc Metal Anode

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Product

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Additive Manufacturing of Zn‐Doped ZrO₂Architectures

Additive Manufacturing of Zn‐Doped ZrO₂Architectures