Non-monotonic lattice parameters variation with crystal size in nanocrystalline CeO2

Kimmel, G.; Sahartov, Alla; Sadia, Yatir; Porat, Ze’ev; Zabicky, Jacob; Dvir, Efraim

doi:10.1016/j.jmrt.2021.02.059

Cited by 18 publications

(13 citation statements)

References 54 publications

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“…Usually, this difference in the ionic radius induces an increase in the lattice parameter as the nanoparticle size decreases [15]. Despite this affirmation, the variation of the lattice parameter with grain size seems to be more complex and non-monotonic, depending on the route of synthesis [16].…”

Section: Introductionmentioning

confidence: 99%

Revealing the Effect of Synthesis Conditions on the Structural, Optical, and Antibacterial Properties of Cerium Oxide Nanoparticles

Fifere¹,

Airinei²,

Dobromir

et al. 2021

Nanomaterials

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Cerium oxide nanoparticles were prepared by a precipitation method using Ce(IV) sulphate as precursor dispersed in glycerol with varying synthesis parameters such as temperature or precipitating agent. The structural and morphological characteristics of the obtained nanoparticles were investigated by X-ray diffraction, transmission electron microscopy, and diffuse reflectance spectroscopy. The crystallite size of the nanoparticles varied between 13 and 17 nm. The presence of Ce3+ and Ce4+ was proved by XPS data in the CeO2 samples and the conservation of the fluorite structure was evinced by X-ray diffractograms with a contraction of the lattice parameter, regardless of the size of the nanoparticle. From diffuse reflectance spectra, two band gap energy values for the direct transition were observed. Depending on the synthesis condition, the red shift of gap energy and the blue shift of Urbach energy with increasing content of Ce3+ were ascertained. The antibacterial tests revealed that the cerium oxide nanoparticles show good antimicrobial activity towards the common pathogens Escherichia coli and Staphylococcus aureus.

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Section: Introductionmentioning

confidence: 99%

Revealing the Effect of Synthesis Conditions on the Structural, Optical, and Antibacterial Properties of Cerium Oxide Nanoparticles

Fifere¹,

Airinei²,

Dobromir

et al. 2021

Nanomaterials

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“…Figure exhibits the XRD patterns of nano-WTO powders calcined at 800 °C under hydrothermal conditions of 180 °C with different doping amounts of tungsten (0, 1, 3, 5, and 7%), and the diffraction peaks gradually widened as the doping amount of tungsten increased. The result indicates that the grain size gradually reduces because the pinning effect of tungsten atoms entering the grain boundary of tin dioxide hinders the movement of the grain boundary, which ultimately inhibits the growth of the grain. , At the same time, due to the severe lattice distortion caused by the high doping amount, the Gibbs free energy that causes the grain growth is weakened, and the grain size is reduced. − It can also be seen from Figure that the diffraction peaks of different angles have different intensities, in which the diffraction peak on the (110) plane is sharper than those on other crystal planes, indicating that the grain of WTO powder grows along the (110) plane preferentially under this condition. In addition, tungsten doping can effectively inhibit the growth of SnO 2 matrix particles because the impurity ions entering the matrix can form a segregation layer on the surface of the matrix particles, thus effectively reducing the total energy of the system. , …”

Section: Results and Discussionmentioning

confidence: 98%

Near-Infrared Shielding Performance of Tungsten-Doped Tin Dioxide Nanoparticles

Chen

et al. 2022

Ind. Eng. Chem. Res.

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Heat-insulating clear coatings have been widely studied and used in energy conservation of buildings. In this article, tungsten-doped tin dioxide (WTO) nanoparticles were synthesized by a facile hydrothermal approach. The effects of molar doping ratios of tungsten, calcination temperatures of the WTO precursor, and hydrothermal synthesis temperatures on the phase composition and optical properties of WTO powder were investigated. The conditions for the preparation of WTO with better optical properties are as follows: the hydrothermal temperature is 180 °C, the molar doping ratio of tungsten is 1%, and the hydrothermal product is calcined at 900 °C. A possible mechanism of the optical properties of nano-WTO powder was proposed, in which tungsten ions provide carriers for tin oxide. It is worth mentioning that this is the first report on the synthesis of WTO nanoparticles and the development of their near-infrared light shielding properties.

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“…For the 5%-CuO/CeO 2 -T-700 sample, the agglomeration of Cu species at high temperatures results in the characteristic peaks of CuO. In addition, the size of the CeO 2 and CuO crystals in the catalysts are calculated using the Scherrer equation and listed in Table . Notably, the greatest CeO 2 (111) crystal size, measuring 17.8 nm, is found in 5%-CuO/CeO 2 -T-700.…”

Section: Resultsmentioning

confidence: 99%

Cu-Embedded CeO₂ Nanotubes as CO₂–Resistant Catalysts for Preferential CO Oxidation in H₂-Rich Streams

Lin,

Wang,

Chi

et al. 2023

ACS Appl. Nano Mater.

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Non-monotonic lattice parameters variation with crystal size in nanocrystalline CeO2

Cited by 18 publications

References 54 publications

Revealing the Effect of Synthesis Conditions on the Structural, Optical, and Antibacterial Properties of Cerium Oxide Nanoparticles

Revealing the Effect of Synthesis Conditions on the Structural, Optical, and Antibacterial Properties of Cerium Oxide Nanoparticles

Near-Infrared Shielding Performance of Tungsten-Doped Tin Dioxide Nanoparticles

Cu-Embedded CeO₂ Nanotubes as CO₂–Resistant Catalysts for Preferential CO Oxidation in H₂-Rich Streams

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Non-monotonic lattice parameters variation with crystal size in nanocrystalline CeO2

Cited by 18 publications

References 54 publications

Revealing the Effect of Synthesis Conditions on the Structural, Optical, and Antibacterial Properties of Cerium Oxide Nanoparticles

Revealing the Effect of Synthesis Conditions on the Structural, Optical, and Antibacterial Properties of Cerium Oxide Nanoparticles

Near-Infrared Shielding Performance of Tungsten-Doped Tin Dioxide Nanoparticles

Cu-Embedded CeO2 Nanotubes as CO2–Resistant Catalysts for Preferential CO Oxidation in H2-Rich Streams

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Cu-Embedded CeO₂ Nanotubes as CO₂–Resistant Catalysts for Preferential CO Oxidation in H₂-Rich Streams