Silica-coated Y2O3:Eu nanoparticles and their luminescence properties

Liu, Guixia; Hong, Guangyan; Dong, Xiangting; Wang, Jinxian

doi:10.1016/j.jlumin.2006.11.002

Cited by 24 publications

(11 citation statements)

References 19 publications

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“…This shows a broad band with peak at 252 nm by monitoring emission at 386 nm. The broad excitation band is due to charge transfer of O 2− to Y 3+ in Y 2 O 3 [35,29]. Fig.…”

Section: Uv-visible Spectramentioning

confidence: 94%

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Shivaramu

Lakshminarasappa

Nagabhushana

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Nanocrystalline Y 2 O 3 is synthesized by solution combustion technique using urea and glycine as fuels. X-ray diffraction (XRD) pattern of as prepared sample shows amorphous nature while annealed samples show cubic nature. The average crystallite size is calculated using Scherrer's formula and is found to be in the range 14-30 nm for samples synthesized using urea and 15-20 nm for samples synthesized using glycine respectively. Field emission scanning electron microscopy (FE-SEM) image of 1173 K annealed Y 2 O 3 samples show well separated spherical shape particles and the average particle size is found to be in the range 28-35 nm. Fourier transformed infrared (FTIR) and Raman spectroscopy reveals a stretching of Y-O bond. Electron spin resonance (ESR) shows V − center, O 2 − and Y 2+ defects. A broad photoluminescence (PL) emission with peak at~386 nm is observed when the sample is excited with 252 nm. Thermoluminescence (TL) properties of γ-irradiated Y 2 O 3 nanopowder are studied at a heating rate of 5 K s −1 . The samples prepared by using urea show a prominent and well resolved peak at~383 K and a weak one at~570 K. It is also found that TL glow peak intensity (I m1 ) at~383 K increases with increase in γ-dose up to~6.0 kGy and then decreases with increase in dose. However, glycine used Y 2 O 3 shows a prominent TL glow with peaks at 396 K and 590 K. Among the fuels, urea used Y 2 O 3 shows simple and well resolved TL glows. This might be due to fuel and hence particle size effect. The kinetic parameters are calculated by Chen's glow curve peak shape method and results are discussed in detail.

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“…This shows a broad band with peak at 252 nm by monitoring emission at 386 nm. The broad excitation band is due to charge transfer of O 2− to Y 3+ in Y 2 O 3 [35,29]. Fig.…”

Section: Uv-visible Spectramentioning

confidence: 94%

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Shivaramu

Lakshminarasappa

Nagabhushana

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…The excitation spectrum consisted of a broad band with its maximum at 254 nm, in the range of 240-260 nm, which could be attributed to the charge-transfer of Y 3+ and O 2− in the Y 2 O 3 particles. The excitation was related to the stability of the electron of the surrounding O 2− , and the position of the excitation peak depended on the nature of surrounding O 2− ions, which was due to the transition of the electrons from the oxygen 2p state to the yttrium conduction band [16][17]. Comparing Fig.…”

Section: Xrd Pattern Sem Image Eds Spectrum and Ft-ir Spectrum Of mentioning

confidence: 95%

Preparation and optical properties of Y2O3/SiO2 powder

Shen

Zhai

2011

Rare Metals

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Y(NO 3 ) 3 and NH 3 ·H 2 O were used as a raw materials, and nano-Y 2 O 3 powder was successfully synthesized by a precipitation method. Employing TEOS as a raw material, SiO 2 powder was successfully prepared by a alkoxide-hydrolysis method, and a Y 2 O 3 /SiO 2 composite powder was obtained by coating. The Y 2 O 3 , SiO 2 , and Y 2 O 3 /SiO 2 powders were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectrophotometer (FT-IR); the Y 2 O 3 and Y 2 O 3 /SiO 2 powders were further examined by photoluminescence (PL) spectra. The results indicated that the Y 2 O 3 powder had a body-centered cubic structure with an average size of 35 nm, while the SiO 2 powder was amorphous, with an average size of 145 nm and a narrow size distribution. The PL spectra of the Y 2 O 3 and Y 2 O 3 /SiO 2 powders showed that their wavelength of emission spectra were 585 nm, while their wavelength of excitation spectra were in the range of 240-260 nm. The optical properties of the Y 2 O 3 /SiO 2 powder were identical to the Y 2 O 3 powder.

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“…Rare‐earth ion‐doped luminescent nanomaterials (nanoparticles, nanotubes, nanowires, etc.) possess the characteristic optical properties, such as much intense and broadened emission, longer lifetime, and red‐ or blue‐shifts of the spectrum . In recent years, some studies devoted to the synthesis of Eu 3+ or Tb 3+ doped LuBO 3 nano‐/micrometer materials, and investigated its reaction mechanism, thermal stability, and optical properties.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning synthesis and photoluminescence properties of one-dimensional LuBO₃ :Ln³⁺ (Ln = Tb, Eu) nanofibers

Shen¹,

Liu

Yang

et al. 2013

Phys. Status Solidi A

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Silica-coated Y2O3:Eu nanoparticles and their luminescence properties

Cited by 24 publications

References 19 publications

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Preparation and optical properties of Y2O3/SiO2 powder

Electrospinning synthesis and photoluminescence properties of one-dimensional LuBO₃ :Ln³⁺ (Ln = Tb, Eu) nanofibers

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Silica-coated Y2O3:Eu nanoparticles and their luminescence properties

Cited by 24 publications

References 19 publications

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Synthesis characterization and luminescence studies of gamma irradiated nanocrystalline yttrium oxide

Preparation and optical properties of Y2O3/SiO2 powder

Electrospinning synthesis and photoluminescence properties of one-dimensional LuBO3 :Ln3+ (Ln = Tb, Eu) nanofibers

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Electrospinning synthesis and photoluminescence properties of one-dimensional LuBO₃ :Ln³⁺ (Ln = Tb, Eu) nanofibers