Luminescence and energy transfer characteristics in silica optical fiber materials with cerium and terbium co-doping

Jiang, Dongya; Wen, Jianxiang; Jia, Ming; Guo, Qiang; Xiao, Zhongyin; Luo, Wenyun; Pang, Fufei; Chen, Zhenyi

doi:10.1364/ome.8.001593

Cited by 17 publications

(7 citation statements)

References 30 publications

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“…The emission spectra was recorded with excitation at 360 nm (Figure 3IIa), which shows four emission bands at 486, 540, 580, and 620 nm, which is due to the characteristic band of transition 5 D 4 → 7 F J (J=6,5,4,3) for Tb(III). 48,51 Similarly, the emission spectra was recorded in the presence of KBrO 3 as shown in Figure 3IIb. From the spectra, it is seen that the Tb(III) characteristic bands are still present, with no signatures of Tb(IV), indicating that Tb(III) species exist in the presence/absence of KBrO 3 .…”

Section: ■ Results and Discussionmentioning

confidence: 98%

“…This is similar to that reported in the literature. 47,48 Upon addition of KBrO 3 to this solution, the sharp peak at 339 nm was replaced with a broad band encompassing three absorbance peaks at 354, 401, and 440 nm as shown in Figure 3Ib. This is attributed to the charge transfer transition from oxygen to the d-Ce(IV) orbital.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Phosphate-based Ce(IV) Ion-Imprinted Polymers for Separation of Berkelium: Testing the Homologue Imprinting Approach for Heavy Actinides

Mhatre

Agarwal

Nag

et al. 2021

ACS Appl. Polym. Mater.

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The present study focuses on the synthesis of phosphate-based ion imprinted polymers (IIPs) using a chemical homologue (cerium(IV)) for the fast and selective separation of Bk(IV) from a large number of fission products. Two imprinted phosphate-based gels, poly(bis[2-(methacryloyloxy)ethyl] phosphate) (poly-BMEP) and poly(bis[2-(methacryloyloxy)ethyl] phosphate-co-acrylic acid) (poly-(BMEP-AA)) have been prepared by in situ UV polymerization. The imprinting has been achieved by complexation of the phosphate-based monomers with the Ce(IV) ion. The desorption of Ce(IV) ions from the imprinted gels has been studied with H2O2. The prepared gels have been characterized by FE-SEM, FT-IR, XRD, and XPS. The imprinted gels have been shown to extract Ce(IV) ions selectively from an 8 mol L–1 HNO3 medium in the presence of fission products (Ba, Ru, Tb). DFT calculations show formation of a 1:4 Ce(IV):BMEP complex. The presence of acrylic acid (AA) has been shown to improve the kinetics of Ce(IV) uptake owing to the decrease in the tortuosity of the polymeric structure due to the AA presence. The imprinted gels though do not show kinetic selectivity toward Ce(IV) compared to non-imprinted gels; they show thermodynamic selectivity toward Ce(IV), indicating the inability of the non-imprinted gels to retain Ce(IV) for longer periods. Also, the imprinted gels have been found to be more selective compared to solvent extraction with BMEP as the complexing agent. These two imprinted gels were used to extract Bk, which was produced in 11B + 238U at a 66 MeV beam energy. The extraction by IIPs have been found to be much faster with the reduction in overall extraction time by ∼80% relative to the earlier reported method though with a lesser selectivity for some elements. The present approach, as guided by DFT calculations, offers a possibility of preparing IIPs for the selective extraction of heavy actinides and trans-actinides using their chemical homologues as the imprinting ion.

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Section: ■ Results and Discussionmentioning

confidence: 98%

Section: ■ Results and Discussionmentioning

confidence: 99%

Phosphate-based Ce(IV) Ion-Imprinted Polymers for Separation of Berkelium: Testing the Homologue Imprinting Approach for Heavy Actinides

Mhatre

Agarwal

Nag

et al. 2021

ACS Appl. Polym. Mater.

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“…This result indicated that much more energy absorbed by Ce 3+ ions was transferred to Tb 3+ ions in the YPS nanocrystal matrix by resonance ET. The improved ET is caused by the shorter distance between Ce 3+ and Tb 3+ ions because they are embedded into YPS nanocrystals simultaneously. , Moreover, the normalized PL spectra of NCF0 and NCF4 are presented in Figure S8 using excitation wavelengths of 305 and 326 nm, respectively. The relative emission intensity of the Ce 3+ ion decreased dramatically, which further confirmed the ET from Ce 3+ to Tb 3+ ions in the YPS nanocrystal.…”

Section: Resultsmentioning

confidence: 99%

“…As the annealing temperature increased, an increasing number of Tb 3+ ions entered the nano-YPS lattices, which lead to an increase in the Tb 3+ ion concentration in the YPS nanocrystals. As a result, the 5 D 4 → 7 F J transitions would decrease because of the enhanced nonradiative relaxation and cross-relaxation among Tb 3+ ions . The luminescence intensities of NCFs, corresponding to 5 D 4 → 7 F J transitions, increased with increasing heat-treatment temperature.…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the 5 D 4 → 7 F J transitions would decrease because of the enhanced nonradiative relaxation and cross-relaxation among Tb 3+ ions. 37 The luminescence intensities of NCFs, corresponding to 5 D 4 → 7 F J transitions, increased with increasing heattreatment temperature. Owing to the small phonon energy of the YPS crystal matrix and increased Tb 3+ ion concentration in the local region, the luminescence efficiency can be significantly improved, which has been reported in many studies.…”

Section: Microstructure Analysesmentioning

confidence: 95%

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Flexible Scintillation Silica Fiber with Engineered Nanocrystals for Remote Real-Time X-ray Detection

Jia

Wen

Pan

et al. 2021

ACS Appl. Mater. Interfaces

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Scintillation fibers based on rare-earth ion-doped crystal materials have attracted significant attention for applications in a wide range of areas from security to healthcare. However, the scintillation performance of crystal fibers is severely limited owing to the complex preparation process. Here, we report a modified preparation process of the transparent Ce/Tb co-doped yttrium pyrosilicate (YPS) nanocrystal silica fiber for the first time, which was fabricated by the CO2 laser-heated method assisted with optimal thermal annealing. An YPS nanocrystal phase with an average size of approximately 38 nm is obtained by controlling the diffusion concentration of SiO2 in the fiber core region. Both Ce3+ and Tb3+ ions were successfully embedded into YPS nanocrystals, which enhanced the energy transfer with an efficiency of 59.87% between the dopants as well as brighter green light emission. Furthermore, the X-ray-excited remote radioluminescence response of the obtained YPS nanocrystal fiber with a length of 20 m was approximately 1 order of magnitude larger than that of the precursor fiber, while the dose rate response exhibited excellent linearity. It is believed that the novel transparent YPS nanocrystal-doped silica optical fibers, combined with their excellent fluorescent properties, could be promising candidates for scintillators, fiber lasers, and phosphors.

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Influence of aliovalent impurity doping and effect of sensitized luminescence in KCl single crystals for dosimetry applications

Krishnakumar

Perumal²

2020

J Mater Sci: Mater Electron

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Luminescence and energy transfer characteristics in silica optical fiber materials with cerium and terbium co-doping

Cited by 17 publications

References 30 publications

Phosphate-based Ce(IV) Ion-Imprinted Polymers for Separation of Berkelium: Testing the Homologue Imprinting Approach for Heavy Actinides

Phosphate-based Ce(IV) Ion-Imprinted Polymers for Separation of Berkelium: Testing the Homologue Imprinting Approach for Heavy Actinides

Flexible Scintillation Silica Fiber with Engineered Nanocrystals for Remote Real-Time X-ray Detection

Influence of aliovalent impurity doping and effect of sensitized luminescence in KCl single crystals for dosimetry applications

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