Influence of Fe3+-doping on optical properties of CeO2− nanopowders

Radović, Marko; Dohčević‐Mitrović, Z.; Golubović, A.; Fruth, Victor; Preda, Silviu; Šćepanović, M.; Popović, Zoran V.

doi:10.1016/j.ceramint.2012.11.087

Cited by 24 publications

(10 citation statements)

References 42 publications

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“…However, for completeness, the values of the indirect band gaps (E i ) are also included in Table 1. The calculated value for indirect band gap for ball milled CeO 2-δ (3.13 eV) was lower than that of the bulk sample (3.22 eV) and within the E i range of reported values characteristic for nanocrystalline CeO 2-δ samples (2.41-3.13 eV) [41][42][43][44][45].…”

Section: Optical Properties and Atomic Vibrational Modes Of Mechanosy...supporting

confidence: 79%

Nanostructure and magnetic anomaly of mechanosynthesized Ce1-xYxO2-δ (x ≤ 0.3) solid solutions

Fábian

Menzel

Yermakov

et al. 2021

Journal of Physics and Chemistry of Solids

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Section: Optical Properties and Atomic Vibrational Modes Of Mechanosy...supporting

confidence: 79%

Nanostructure and magnetic anomaly of mechanosynthesized Ce1-xYxO2-δ (x ≤ 0.3) solid solutions

Fábian

Menzel

Yermakov

et al. 2021

Journal of Physics and Chemistry of Solids

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“…First, it is valid in a relatively narrow energy range corresponding to the region of parabolic bands where a sharp increase of the optical transmission is detectable experimentally (Amato 1991). Second, Tauc's plot overestimates slightly band gap in a reflection type of measurement such as spectroscopic ellipsometry (Radović et al 2013). Finally, there is ambiguity on the energy range that the Tauc's extrapolation is correct (Solomon et al 1988).…”

Section: Resultsmentioning

confidence: 96%

Electrical conductivity, thermal conductivity, and rheological properties of graphene oxide-based nanofluids

Hadadian

Goharshadi

Youssefi³

2014

J Nanopart Res

154

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Highly stable graphene oxide (GO)-based nanofluids were simply prepared by dispersing graphite oxide with the average crystallite size of 20 nm, in polar base fluids without using any surfactant. Electrical conductivity, thermal conductivity, and rheological properties of the nanofluids were measured at different mass fractions and various temperatures. An enormous enhancement, 25,678 %, in electrical conductivity of distilled water was observed by loading 0.0006 mass fraction of GO at 25°C. GO-ethylene glycol nanofluids exhibited a non-Newtonian shearthinning behavior followed by a shear-independent region. This shear-thinning behavior became more pronounced at higher GO concentrations. The maximum ratio of the viscosity of nanofluid to that of the ethylene glycol as a base fluid was 3.4 for the mass fraction of 0.005 of GO at 20°C under shear rate of 27.5 s -1 . Thermal conductivity enhancement of 30 % was obtained for GO-ethylene glycol nanofluid for mass fraction of 0.07. The measurement of the transport properties of this new kind of nanofluid showed that it could provide an ideal fluid for heat transfer and electronic applications.

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“…Barbosa et al synthesised Ce 1−x M x O 2 (M = Mn, Cr, Co and Fe) from aqueous sodium hydroxide solution and studied the magnetic behaviour [76]. Radović et al synthesised ceria materials with up to 5 mol% iron by crystallisation from aqueous ammonia solution, and optical properties were studied by spectroscopic ellipsometry [77]. Fe-substituted CeO 2 prepared from nitrate salts in aqueous ammonia was found to have a high level of oxide vacancies useful for photocatalytic ozonation [78].…”

Section: Transition Metal-substituted Ceriasmentioning

confidence: 99%

Solvothermal Synthesis Routes to Substituted Cerium Dioxide Materials

et al. 2021

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We review the solution-based synthesis routes to cerium oxide materials where one or more elements are included in place of a proportion of the cerium, i.e., substitution of cerium is performed. The focus is on the solvothermal method, where reagents are heated above the boiling point of the solvent to induce crystallisation directly from the solution. This yields unusual compositions with crystal morphology often on the nanoscale. Chemical elements from all parts of the periodic table are considered, from transition metals to main group elements and the rare earths, including isovalent and aliovalent cations, and surveyed using the literature published in the past ten years. We illustrate the versatility of this synthesis method to allow the formation of functional materials with applications in contemporary applications such as heterogeneous catalysis, electrodes for solid oxide fuel cells, photocatalysis, luminescence and biomedicine. We pick out emerging trends towards control of crystal habit by use of non-aqueous solvents and solution additives and identify challenges still remaining, including in detailed structural characterisation, the understanding of crystallisation mechanisms and the scale-up of synthesis.

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Influence of Fe3+-doping on optical properties of CeO2− nanopowders

Cited by 24 publications

References 42 publications

Nanostructure and magnetic anomaly of mechanosynthesized Ce1-xYxO2-δ (x ≤ 0.3) solid solutions

Nanostructure and magnetic anomaly of mechanosynthesized Ce1-xYxO2-δ (x ≤ 0.3) solid solutions

Electrical conductivity, thermal conductivity, and rheological properties of graphene oxide-based nanofluids

Solvothermal Synthesis Routes to Substituted Cerium Dioxide Materials

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