Synthesis and comparative study of Ce3+ ion in calcium aluminates

Gedekar, K.A.; Wankhede, S. P.; Moharil, S. V.

doi:10.1007/s10971-017-4341-z

Cited by 13 publications

(5 citation statements)

References 31 publications

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“…In this phosphor, Ca 2+ ions occupy three different lattice sites Ca1, Ca2, and Ca3 [28]. Ca1 and Ca2 have the disordered octahedral geometry and site Ca3 forms the tri-capped trigonal anti-prism polyhedron.…”

Section: Crystal Structure Of Mal 2 O 4 (M = Ca Sr Ba)mentioning

confidence: 99%

“…Ca1 and Ca2 have the disordered octahedral geometry and site Ca3 forms the tri-capped trigonal anti-prism polyhedron. Sites Ca1 and Ca2 have coordination six and site Ca3 nine [28]. Ionic radius of 9-coordinated Ca 2+ and Ce 3+ are 1.18 and 1.196 Å respectively.…”

Section: Crystal Structure Of Mal 2 O 4 (M = Ca Sr Ba)mentioning

confidence: 99%

“…In addition experimental results are near to 9-fold coordination geometry of Ca 2+ ion than the 6-fold coordination. Thus Ce 3+ and Eu 2+ will occupy tri-capped trigonal anti-prism polyhedron 9-coordinated Ca3 site in crystal lattice [28]. …”

Section: Prediction Of Eu 2+ Levels From Ce 3+mentioning

confidence: 99%

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d–f luminescence of Ce3+ and Eu2+ ions in BaAl2O4, SrAl2O4 and CaAl2O4 phosphors

Gedekar¹,

Wankhede²,

Moharil

et al. 2017

J Adv Ceram

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Section: Crystal Structure Of Mal 2 O 4 (M = Ca Sr Ba)mentioning

confidence: 99%

Section: Crystal Structure Of Mal 2 O 4 (M = Ca Sr Ba)mentioning

confidence: 99%

See 1 more Smart Citation

d–f luminescence of Ce3+ and Eu2+ ions in BaAl2O4, SrAl2O4 and CaAl2O4 phosphors

Gedekar¹,

Wankhede²,

Moharil

et al. 2017

J Adv Ceram

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“…Pristine steel slag, supplied by AcciaieriedItalia (Italy Taranto Plant), consists of two crystalline phases, namely CaAl 2 O 4 13 and Fe 3 O 4 14 in a 65 and 35 ratio respectively, based on a Rietveld profile refinement (Supporting Information, Figure S1 ). Nanostructured palladium was deposited onto the slag by a wet impregnation method 15 affording the nanocomposite Pd@slag labelled as catalyst 1 .…”

Section: Resultsmentioning

confidence: 99%

Steel slag as low-cost catalyst for artificial photosynthesis to convert CO2 and water into hydrogen and methanol

Fusco

Casiello

Pisani

et al. 2022

Sci Rep

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Photoreduction of CO2 with sunlight to produce solar fuels, also named artificial photosynthesis, is considered one of the most attractive strategies to face the challenge of reducing greenhouse gases and achieving climate neutrality. Following an approach in line with the principles of the circular economy, the low-cost catalytic system (1) based on an industrial by-product such as steel slag was assessed, which was properly modified with nanostructured palladium on its surface in order to make it capable of promoting the conversion of CO2 into methanol and hydrogen through a two-stage process of photoreduction and thermal conversion having formic acid as the intermediate. Notably, for the first time in the literature steel slag is used as photoreduction catalyst.

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“…Oxide-based inorganic phosphors, due to their excellent photostability and low toxic level, have found many applications in scintillators, lasers, multicolor displays, lighting systems, and biological and chemical sensing. − Chemically stable alkaline earth aluminates MAl 2 O 4 (M = Ca, Sr, or Ba) have been used as a host material of phosphors. − Among them, Ce 3+ and Eu 2+ doped CaAl 2 O 4 have been extensively explored − for their long-lasting persistent afterglow. The relative positions of the luminescent levels and other defect levels with respect to band edges are critical in determining the properties of scintillators, thermal quenching of phosphors, and persistent afterglow.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Density Functional Study of the Local Structures and Energy Levels of CaAl₂O₄:Ce³⁺

et al. 2018

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First-principles calculations were carried out for the electronic structures of Ce in calcium aluminate phosphors, CaAlO, and their effects on luminescence properties. Hybrid density functional approaches were used to overcome the well-known underestimation of band gaps of conventional density functional approaches and to calculate the energy levels of Ce ions more accurately. The obtained 4f-5d excitation and emission energies show good consistency with measured values. A detailed energy diagram of all three sites is obtained, which explains qualitatively all of the luminescent phenomena. With the results of energy levels calculated by combining the hybrid functional of Heyd, Scuseria, and Ernzerhof (HSE06) and the constraint occupancy approach, we are able to construct a configurational coordinate diagram to analyze the processes of capture of a hole or an electron and luminescence. This approach can be applied for systematic high-throughput calculations in predicting Ce activated luminescent materials with a moderate computing requirement.

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Synthesis and comparative study of Ce3+ ion in calcium aluminates

Cited by 13 publications

References 31 publications

d–f luminescence of Ce3+ and Eu2+ ions in BaAl2O4, SrAl2O4 and CaAl2O4 phosphors

d–f luminescence of Ce3+ and Eu2+ ions in BaAl2O4, SrAl2O4 and CaAl2O4 phosphors

Steel slag as low-cost catalyst for artificial photosynthesis to convert CO2 and water into hydrogen and methanol

Hybrid Density Functional Study of the Local Structures and Energy Levels of CaAl₂O₄:Ce³⁺

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Synthesis and comparative study of Ce3+ ion in calcium aluminates

Cited by 13 publications

References 31 publications

d–f luminescence of Ce3+ and Eu2+ ions in BaAl2O4, SrAl2O4 and CaAl2O4 phosphors

d–f luminescence of Ce3+ and Eu2+ ions in BaAl2O4, SrAl2O4 and CaAl2O4 phosphors

Steel slag as low-cost catalyst for artificial photosynthesis to convert CO2 and water into hydrogen and methanol

Hybrid Density Functional Study of the Local Structures and Energy Levels of CaAl2O4:Ce3+

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Hybrid Density Functional Study of the Local Structures and Energy Levels of CaAl₂O₄:Ce³⁺