Luminescence properties of Eu2+ and Eu3+ doped calcium-deficient hydroxyapatite prepared in air

Feng, Zhiqiang; Li, Yadong; Huang, Yanlin; Seo, Hyo Jin

doi:10.1016/j.jallcom.2011.04.003

Cited by 22 publications

(14 citation statements)

References 24 publications

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“…Fine crystalline powders of Y 3 was filled with 1.0-5.0 mol% hydrofluoric acid aqueous solutions up to 70% of the total volume. Hydrothermal synthesis was performed at 250°C under autogenous pressure for 120 h. After the autoclave was cooled to room temperature and depressurized, the final powder product was washed with water and dried in air at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…There have been extensive studies on in oxide-based phosphors such as phosphates [1][2][3], borates [4][5][6], and silicates [7][8][9][10] doped with rare earth ions. In particular, the silicate-based phosphors have recently attracted much attention because of its excellent thermal and chemical stability, lower cost, and high luminescent efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Luminescence properties and crystallographic sites for Eu3+ ions in fluorthalenite Y3Si3O10F

Jang

Хайдуков

Tuyen

et al. 2012

Journal of Alloys and Compounds

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Luminescence properties and crystallographic sites for Eu3+ ions in fluorthalenite Y3Si3O10F

Jang

Хайдуков

Tuyen

et al. 2012

Journal of Alloys and Compounds

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“…Moreover, the RE ions doped HAp nanoparticles have better features as luminescence imaging agents including low toxicity, photostability, thermal and chemical stability, and real-time imaging [4,[7][8][9]. Their luminescence imaging ability is affected by a degree of crystallinity, size distribution, and dispersion of nanoparticles as well as crystal field contributions [1,5,10].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Fluorine Substitution for –OH Group on the Luminescence Property of Eu3+ Doped Hydroxyapatite

et al. 2020

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In this study, different fluoridated hydroxyapatite doped with Eu3+ ion nanoparticles were prepared by the hydrothermal method. The relationship between luminescence enhancement of Eu3+ ions and a fluorine substitution ratio for hydroxyl group in hydroxyapatite was discussed. Moreover, the effect of fluorine substitution for a hydroxyl group on phase composition, crystallinity, and crystal size was studied. Phase composition and chemical structures were identified by X-ray diffraction (XRD) and Fourier Transform Infrared (FT-IR) Spectroscopy analyses. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) patterns were performed to analyze the morphology and particle size. X-ray Photoelectron Spectroscopy (XPS) patterns were observed to analyze fluorine substitution for the hydroxyl group and chemical state of Eu3+ ions in fluoridated hydroxyapatite. The results of these experiments indicated that the samples with a different fluorine substitution ratio were prepared successfully by maintaining the apatite structure. With an increasing fluorine substitution ratio, the morphology maintained a rod-like structure but the aspect ratio tended to decrease. XPS patterns displayed that the fluorine replaced the hydroxyl group and brought environmental variation. The fluorine ions could affect the crystal field environment and promote luminescence conversion. There was a linear relationship between the fluorine substitution ratio and luminescence enhancement.

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“…For the preparation of site‐selective occupied hydroxyapatite samples, the synthetic method should be considered firstly. Although many methods have been developed for the synthesis of hydroxyapatite with various morphologies, such as high‐temperature solid‐state reaction, ultrasound assisted precipitation method, microwave assisted microemulsion process, coprecipitation method,, solvothermal and hydrothermal method,, microwave assisted hydrothermal method, most of these methods request a high‐temperature dehydration process to obtain high crystallinity, and the resulted crystals do not have a uniform morphology . These methods have synthesized various morphologies of hydroxyapatite crystals, such as nanorings .…”

Section: Introductionmentioning

confidence: 99%

Morphology, Structure Evolution and Site‐Selective Occupancy of Eu³⁺ in Ca₁₀(PO₄)₆(OH)₂ Nanorods Synthesized via Subcritical Hydrothermal Method

et al. 2018

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The structure and composition evolution of hydroxyapatite in bone and teeth play important roles on their strength and durability, especially of the local chemical environment of Ca evolution, that determines bone demineralization and osteoporosis. In this paper, we synthesized a series of Eu-doped (2-10%) hydroxyapatite nanorod via subcritical hydrothermal method at high temperature (220-280 o C) with the doped ions fully occupied at Ca1-site. The as-synthesized samples are grown with uniform particle size and shape distribution. Crystal morphology formation mechanism has been discussed based on the Bravais-Friedel-Donnay-Harker method and crystal structure of hydroxyapatite. Powder X-ray diffraction result and Pawley fitting of the diffraction pattern for Eu-doped hydrox-yapatite samples indicate a linear structure evolution with increasing doping level. FTIR spectra suggest the minimal structure change for Eu-doped hydroxyapatite nanocrystals. Photoluminescent spectra of Ca 10 (PO 4 ) 6 (OH) 2 :Eu indicates the doping of Eu happens at the Ca1-site, which shows a concentration-dependent emission intensity evolution behavior. Decay curves for the 5 D 0 ! 7 F 2 transition of Eu 3 + in each samples suggested a longer lifetime in our samples than the similar composition that prepared via other methods. The siteselective occupancy of Eu-doped hydroxyapatite luminescent phenomenon may serve as a potential indicator for monitoring the Ca-loss in bones and teeth that caused osteoporosis in aging people.[a] Dr.

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Luminescence properties of Eu2+ and Eu3+ doped calcium-deficient hydroxyapatite prepared in air

Cited by 22 publications

References 24 publications

Luminescence properties and crystallographic sites for Eu3+ ions in fluorthalenite Y3Si3O10F

Luminescence properties and crystallographic sites for Eu3+ ions in fluorthalenite Y3Si3O10F

Effect of the Fluorine Substitution for –OH Group on the Luminescence Property of Eu3+ Doped Hydroxyapatite

Morphology, Structure Evolution and Site‐Selective Occupancy of Eu³⁺ in Ca₁₀(PO₄)₆(OH)₂ Nanorods Synthesized via Subcritical Hydrothermal Method

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Luminescence properties of Eu2+ and Eu3+ doped calcium-deficient hydroxyapatite prepared in air

Cited by 22 publications

References 24 publications

Luminescence properties and crystallographic sites for Eu3+ ions in fluorthalenite Y3Si3O10F

Luminescence properties and crystallographic sites for Eu3+ ions in fluorthalenite Y3Si3O10F

Effect of the Fluorine Substitution for –OH Group on the Luminescence Property of Eu3+ Doped Hydroxyapatite

Morphology, Structure Evolution and Site‐Selective Occupancy of Eu3+ in Ca10(PO4)6(OH)2 Nanorods Synthesized via Subcritical Hydrothermal Method

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Morphology, Structure Evolution and Site‐Selective Occupancy of Eu³⁺ in Ca₁₀(PO₄)₆(OH)₂ Nanorods Synthesized via Subcritical Hydrothermal Method