Collaborative influence of morphology tuning and RE (La, Y, and Sm) doping on photocatalytic performance of nanoceria

Xia, Xuewen; Li, Junqi; Chen, Chaoyi; Lan, Yuanpei; Mao, Xisong; Chu, Zhiyao; Ning, Deyang; Zhang, Junshan; Liu, Fengyuan

doi:10.1007/s11356-022-21787-6

Cited by 7 publications

(2 citation statements)

References 61 publications

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“…The reduction in the band-gap energy of Sm-doped TiO

indicates a red shift of the light adsorption. A decrease in

in Sm-doped CeO

NPs is also observed in [ 86 , 87 , 88 ], which can increase the photocatalytic activity. The decrease in

with increasing Tb ( r = 1.06

) or Er ( r = 1.03

) doping concentration is presented in Figure 4 , curves 2 and 3, in coincidence with Lee et al for Er-doped TiO

thin films [ 89 ].…”

Section: Resultsmentioning

confidence: 92%

Band Gap Tuning in Transition Metal and Rare-Earth-Ion-Doped TiO2, CeO2, and SnO2 Nanoparticles

2022

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The energy gap Eg between the valence and conduction bands is a key characteristic of semiconductors. Semiconductors, such as TiO2, SnO2, and CeO2 have a relatively wide band gap Eg that only allows the material to absorb UV light. Using the s-d microscopic model and the Green’s function method, we have shown two possibilities to reduce the band-gap energy Eg—reducing the NP size and/or ion doping with transition metals (Co, Fe, Mn, and Cu) or rare earth (Sm, Tb, and Er) ions. Different strains appear that lead to changes in the exchange-interaction constants, and thus to a decrease in Eg. Moreover, the importance of the s-d interaction, which causes room-temperature ferromagnetism and band-gap energy tuning in dilute magnetic semiconductors, is shown. We tried to clarify some discrepancies in the experimental data.

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“…The reduction in the band-gap energy of Sm-doped TiO

indicates a red shift of the light adsorption. A decrease in

in Sm-doped CeO

NPs is also observed in [ 86 , 87 , 88 ], which can increase the photocatalytic activity. The decrease in

with increasing Tb ( r = 1.06

) or Er ( r = 1.03

) doping concentration is presented in Figure 4 , curves 2 and 3, in coincidence with Lee et al for Er-doped TiO

thin films [ 89 ].…”

Section: Resultsmentioning

confidence: 92%

Band Gap Tuning in Transition Metal and Rare-Earth-Ion-Doped TiO2, CeO2, and SnO2 Nanoparticles

2022

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“…Moreover, La addition into ceria decreases the sintering effect of nanoparticles at high temperatures [34]. The incorporation of lanthanum into controlled-morphology ceria nanoparticles has recently attracted scientific attention due to the advantages mentioned before [35][36][37][38]. For example, Xia et al [37] have recently published the synthesis of La-, Y-, or Sm-doped ceria nanorods with dopant molar concentrations ranging between 0 and 30%.…”

Section: Introductionmentioning

confidence: 99%

NO Oxidation on Lanthanum-Doped Ceria Nanoparticles with Controlled Morphology

et al. 2023

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The present work aims to assess the impact of morphology and reducibility on lanthanum-doped ceria nanocatalysts with controlled morphology on the NO oxidation reaction. Specifically, samples were prepared using a hydrothermal method incorporating lanthanum at varying molar concentrations (0, 5, 10, and 15 mol.%) into ceria with a controlled morphology (nanocubes and nanorods). The structural, compositional, and redox characterization of these catalysts has been performed via scanning transmission electron microscopy (STEM), X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (X-EDS), inductively coupled plasma (ICP), hydrogen temperature-programmed reduction (H2-TPR), and oxygen storage capacity (OSC). NO oxidation catalytic tests were conducted, and the results were compared with estimated curves (obtained by considering the proportions of the corresponding components), which revealed the presence of a synergistic effect between lanthanum and ceria. The degree of enhancement was found to depend on both the morphology and the amount of lanthanum incorporated into CeO2. These findings may facilitate the optimization of features concerning ceria-based nanocatalysts for the removal of NOx emissions from exhaust gases.

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Synthesis, characterization, and double shielding performance for ultraviolet and short-wave blue light of ceria-based materials

Li,

Bian,

et al. 2024

Ceramics International

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Collaborative influence of morphology tuning and RE (La, Y, and Sm) doping on photocatalytic performance of nanoceria

Cited by 7 publications

References 61 publications

Band Gap Tuning in Transition Metal and Rare-Earth-Ion-Doped TiO2, CeO2, and SnO2 Nanoparticles

Band Gap Tuning in Transition Metal and Rare-Earth-Ion-Doped TiO2, CeO2, and SnO2 Nanoparticles

NO Oxidation on Lanthanum-Doped Ceria Nanoparticles with Controlled Morphology

Synthesis, characterization, and double shielding performance for ultraviolet and short-wave blue light of ceria-based materials

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