Crystal field-induced lattice expansion upon reversible oxygen uptake/release in YbMnxFe2−xO4

Li, Tianyu; Jayathilake, Rishvi; Balisetty, Lahari; Zhang, Yuan; Wilfong, Brandon; Diethrich, Timothy J.; Rodriguez, Efrain E.

doi:10.1039/d1ma00822f

Cited by 3 publications

(2 citation statements)

References 68 publications

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“…The variations of the experimental microstructural parameters registered here have oscillatory behavior, confirming the registered and analyzed results of the GS and ID. The disordered variations are associated in principle with the creation of different chemical bonds in the transition from Cd<𝐶𝑂 3 2− a Cd-O is imperative, as a consequence crystalline distortion is created until reaching the minimum energy gradually in the lattice crystalline considering possible distorted elongations of the lattice parameters, which implies promising structural stability [39]. The microstructural phenomenon is associated with the orderdisorder effect typical of some reversible systems or vice versa.…”

Section: Xrd Diffractionmentioning

confidence: 99%

Analysis of the conversion of Cadmium carbonate (CdCO3) to Cadmium oxide (CdO) in thin films with photocatalytic application

Coyotecatl,

Garrido,

Portillo

et al. 2024

Preprint

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The Cadmium Carbonate (CdCO3) films were successfully synthesized using the chemical bathroom deposition (CBD) technique to vary later the temperature from 30 ° C, 150 ° C, 300 ° C, 400 ° C and 500 ° C with the CdO was obtained. A step-by-step study was carried out of the chemical reaction coordination complex that is the basis for converting CdCO3 to CdO. With SEM it was possible to perform the morphological studio of the films of CdCO3 Showing a pyramidal shape in each of the samples. The vibration bands in the FTIR spectrum, located at range ~ 3600 − 400 cm-1, corresponding to characteristic vibrations of the carbonate ((CO3)−2) ion, carboxylates, and OH ions were identified. The X-ray diffraction (XRD) technique was applied to investigate the structural and microstructural properties of polycrystalline thin films and the phase change from CdCO3 to CdO. The optical properties of all films such as Absorption, Transmittance, and Reflectance were analyzed, getting a GAP of 1.87–2.37 eV. And, nanostructured films were applied to photocatalysis with a low percentage of photocatalytic efficiency of 8 ~ 14% in 90 minutes.

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Section: Xrd Diffractionmentioning

confidence: 99%

Analysis of the conversion of Cadmium carbonate (CdCO3) to Cadmium oxide (CdO) in thin films with photocatalytic application

Coyotecatl,

Garrido,

Portillo

et al. 2024

Preprint

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“…The atmospheric plasma promoted the formation of the OH(b) group, which is the chemisorbed surface oxygen on the zirconia surface (Figure 2F). The binding energy of O L shifted to a lower energy with the use of vacuum plasma (Figure 2C), implying that the lattice oxygen became more ionic in character [26].…”

Section: Surface Chemistrymentioning

confidence: 99%

Plasma Surface Modification of 3Y-TZP at Low and Atmospheric Pressures with Different Treatment Times

Kang

Kim

You

et al. 2023

IJMS

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The efficiency of plasma surface modifications depends on the operating conditions. This study investigated the effect of chamber pressure and plasma exposure time on the surface properties of 3Y-TZP with N2/Ar gas. Plate-shaped zirconia specimens were randomly divided into two categories: vacuum plasma and atmospheric plasma. Each group was subdivided into five subgroups according to the treatment time: 1, 5, 10, 15, and 20 min. Following the plasma treatments, we characterized the surface properties, including wettability, chemical composition, crystal structure, surface morphology, and zeta potential. These were analyzed through various techniques, such as contact angle measurement, XPS, XRD, SEM, FIB, CLSM, and electrokinetic measurements. The atmospheric plasma treatments increased zirconia’s electron donation (γ−) capacity, while the vacuum plasma treatments decreased γ− parameter with increasing times. The highest concentration of the basic hydroxyl OH(b) groups was identified after a 5 min exposure to atmospheric plasmas. With longer exposure times, the vacuum plasmas induce electrical damage. Both plasma systems increased the zeta potential of 3Y-TZP, showing positive values in a vacuum. In the atmosphere, the zeta potential rapidly increased after 1 min. Atmospheric plasma treatments would be beneficial for the adsorption of oxygen and nitrogen from ambient air and the generation of various active species on the zirconia surface.

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Structural modulation and spin glassiness upon oxidation in oxygen storage material LnFeMnO4+x for Ln = Y, Lu, and Yb

Liou

Hong

et al. 2023

APL Materials

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The mixed valence multiferroic LnFe2+Fe3+O4 (where Ln = Y, Lu, and Yb) can reversibly uptake oxygen into its lattice, which is evidenced by a crystallographic phase transition along with the appearance of structural modulations. In this study, we show that the Mn-substituted version of this multiferroic can also be readily oxidized to LnFe3+Mn3+O4.5 revealing similar oxygen storage behavior. Through neutron, electron, and synchrotron x-ray diffraction studies, we observe a structural modulation that we attribute to a displacement wave in the fully oxidized compound. This wave exhibits commensurability with a wavevector q = (−2/7, 1/7, 0). Bond valence summation analysis of plausible interstitial oxygen positions suggests that oxygen insertion likely occurs at the middle of the Fe/Mn–O bipyramid layers. The structural modulation of LnFeMnO4.5 is two-dimensional, propagates along the ab-plane, and is highly symmetric as 12 identical modulation vectors are observed in the diffraction patterns. The nature of the lanthanide, Ln3+, does not seem to influence such modulations since we observe identical satellite reflections for all three samples of Ln = Y, Lu, and Yb. Both LnFeMnO4 and LnFeMnO4.5 display spin glassy behavior with 2D short-range magnetic ordering being observed in LnFeMnO4. Analysis of the neutron diffraction data reveals a correlation length of ∼10 nm. Upon oxidation to LnFeMnO4.5, the short-range magnetic order is significantly suppressed.

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Crystal field-induced lattice expansion upon reversible oxygen uptake/release in YbMn_xFe_2−xO₄

Abstract: We successfully form the solid solutions YbMnxFe2-xO4 for x = 0.25, 0.50, 0.75, and 1.0 in order to study the mechanism of oxygen release and uptake as a function of...

Cited by 3 publications

References 68 publications

Analysis of the conversion of Cadmium carbonate (CdCO3) to Cadmium oxide (CdO) in thin films with photocatalytic application

Analysis of the conversion of Cadmium carbonate (CdCO3) to Cadmium oxide (CdO) in thin films with photocatalytic application

Plasma Surface Modification of 3Y-TZP at Low and Atmospheric Pressures with Different Treatment Times

Structural modulation and spin glassiness upon oxidation in oxygen storage material LnFeMnO4+x for Ln = Y, Lu, and Yb

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