Structural, electronic paramagnetic resonance and magnetic properties of praseodymium-doped rare earth CeO2 semiconductors

Oliveira, L. L.; Cortés, Juan; Caldeira, B.S.; Strusch, Tanja; Wiedwald, Ulf; Simões, Alexandre Zirpoli

doi:10.1016/j.ceramint.2021.04.133

Cited by 21 publications

(6 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photocatalytic test conducted on the La-doped ceria revealed that the 8% La-doped ceria exhibited the highest degradation efficiency of about 87% owing to its oxygen vacancies. On the contrary, Pr-doped ceria prepared by the microwave-assisted method did not show any significant change with Pr dopant concentration; all are superparamagnetic below the blocking temperature of 20 K and paramagnetic above the blocking temperature Table shows the f block metal doped ceria and their application and respective findings.…”

Section: Doped Ceria Nanomaterialsmentioning

confidence: 83%

“…On the contrary, Pr-doped ceria prepared by the microwave-assisted method did not show any significant change with Pr dopant concentration; all are superparamagnetic below the blocking temperature of 20 K and paramagnetic above the blocking temperature. 99 Table 4 shows the f block metal doped ceria and their application and respective findings.…”

Section: Doped Ceria Nanomaterialsmentioning

confidence: 99%

See 1 more Smart Citation

Doped Ceria Nanomaterials: Preparation, Properties, and Uses

Abdulwahab,

Khan,

Jennings

2023

ACS Omega

View full text Add to dashboard Cite

Doping is a powerful strategy for enhancing the performance of ceria (CeO2) nanomaterials in a range of catalytic, photocatalytic, biomedical, and energy applications. The present review summarizes recent developments in the doping of ceria nanomaterials with metal and non-metal dopants for selected applications. The most important metal dopants are grouped into s, p, d, and f block elements, and the relevant synthetic methods, novel properties, and key applications of metal doped ceria are collated and critically discussed. Non-metal dopants are similarly examined and compared with metal dopants using the same performance criteria. The review reveals that non-metal (N, S, P, F, and Cl) doped ceria has mainly been synthesized by calcination and hydrothermal methods, and it has found applications mostly in photocatalysis or as a cathode material for LiS batteries. In contrast, metal doped ceria nanomaterials have been prepared by a wider range of synthetic routes and evaluated for a larger number of applications, including as catalysts or photocatalysts, as antibacterial agents, and in devices such as fuel cells, gas sensors, and colorimetric detectors. Dual/co-doped ceria containing both metals and non-metals are also reviewed, and it is found that co-doping often leads to improved properties compared with single-element doping. The review concludes with a future outlook that identifies unaddressed issues in the synthesis and applications of doped ceria nanomaterials.

show abstract

Section: Doped Ceria Nanomaterialsmentioning

confidence: 83%

Section: Doped Ceria Nanomaterialsmentioning

confidence: 99%

Doped Ceria Nanomaterials: Preparation, Properties, and Uses

Abdulwahab,

Khan,

Jennings

2023

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Broad resonance at B 0 = 3380 G may be associated with Ce 3+ (CeO7) –O 2(surface) interactions, which creates an oxygen-active surface. Samples synthesized in acetone show higher B 0 intensity, indicating that synthesis in acetone may produce a higher oxygen vacancy density CeO 2 structure, proving the presence of paramagnetic Ce 3+ species ([Xe] 4f 1 5d 0 ) . This result is in accordance with the bandgap value obtained for each sample, suggesting the formation of a larger number of defects on samples synthesized in acetone ( E gap = 2.52 eV), whereas a more organized crystal may be associated with the sample prepared in ethanol ( E gap = 2.81 eV).…”

Section: Resultsmentioning

confidence: 99%

“…Rare-earth (Pr, Eu, and La) doped ceria nanoparticles were also synthesized via MAH, and the dopant influence on the optical, magnetic, and gas sensing properties of ceria was studied. 42,43 However, to the best of our knowledge the effect of solvents other than water on the properties of ceria nanostructures has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Amoresi et al and Oliveira et al prepared different morphologies of CeO 2 NCs by controlling the basic environment concentration and reaction time, obtaining nanocubes, nanobeans, nanorods, nanohexagons, and nanowires. Rare-earth (Pr, Eu, and La) doped ceria nanoparticles were also synthesized via MAH, and the dopant influence on the optical, magnetic, and gas sensing properties of ceria was studied. , However, to the best of our knowledge the effect of solvents other than water on the properties of ceria nanostructures has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO₂ Nanocrystals

et al. 2023

View full text Add to dashboard Cite

In this work, we focus on understanding the morphology and photocatalytic properties of CeO2 nanocrystals (NCs) synthesized via a microwave-assisted solvothermal method using acetone and ethanol as solvents. Wulff constructions reveal a complete map of available morphologies and a theoretical-experimental match with octahedral nanoparticles obtained through synthesis using ethanol as solvent. NCs synthesized in acetone show a greater contribution of emission peaks in the blue region (∼450 nm), which may be associated with higher Ce3+ concentration, originating shallow-level defects within the CeO2 lattice while for the samples synthesized in ethanol a strong orange-red emission (∼595 nm) suggests that oxygen vacancies may originate from deep-level defects within the optical bandgap region. The superior photocatalytic response of CeO2 synthesized in acetone compared to that of CeO2 synthesized in ethanol may be associated with an increase in long-/short-range disorder within the CeO2 structure, causing the E gap value to decrease, facilitating light absorption. Furthermore, surface (100) stabilization in samples synthesized in ethanol may be related to low photocatalytic activity. Photocatalytic degradation was facilitated by the generation of ·OH and ·O2 – radicals as corroborated by the trapping experiment. The mechanism of enhanced photocatalytic activity has been proposed suggesting that samples synthesized in acetone tend to have lower e′h· pair recombination, which is reflected in their higher photocatalytic response.

show abstract

Synthesis of ultrathin CeO2 nanosheets for enhanced electrocatalytic degradation of 17-alpha-ethynylestradiol

Huang,

Wang,

et al. 2024

Rare Met.

View full text Add to dashboard Cite

Structural, electronic paramagnetic resonance and magnetic properties of praseodymium-doped rare earth CeO2 semiconductors

Cited by 21 publications

References 48 publications

Doped Ceria Nanomaterials: Preparation, Properties, and Uses

Doped Ceria Nanomaterials: Preparation, Properties, and Uses

The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO₂ Nanocrystals

Synthesis of ultrathin CeO2 nanosheets for enhanced electrocatalytic degradation of 17-alpha-ethynylestradiol

Contact Info

Product

Resources

About

Structural, electronic paramagnetic resonance and magnetic properties of praseodymium-doped rare earth CeO2 semiconductors

Cited by 21 publications

References 48 publications

Doped Ceria Nanomaterials: Preparation, Properties, and Uses

Doped Ceria Nanomaterials: Preparation, Properties, and Uses

The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO2 Nanocrystals

Synthesis of ultrathin CeO2 nanosheets for enhanced electrocatalytic degradation of 17-alpha-ethynylestradiol

Contact Info

Product

Resources

About

The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO₂ Nanocrystals