Effect of lithium substitution on the charge compensation, structural and luminescence properties of nanocrystalline Ca10(PO4)6F2 activated with Eu3+ ions. Issue 19 (26th April 2016)

• Record Type: Journal Article
• Authors: Sobierajska, Paulina; Pazik, Robert; Zawisza, Katarzyna; Renaudin, Guillaume; Nedelec, Jean-Marie; Wiglusz, Rafal J.
• Is Part Of: CrystEngComm. Volume 18:Issue 19(2016)
• Page Start: 3447
• Page End: 3455
• Publication Date: 2016-04-26
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c6ce00320f
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : An impact of Li + ions on the structural, morphological, and optical properties of Eu0.1 Ca9.85 (PO4 )6 F2 nanoparticles. Abstract : Eu 3+ and Li + ion co-doped fluorapatite (Ca10 (PO4 )6 F2 ) nanocrystals were fabricated using a microwave stimulated hydrothermal technique followed by heat treatment at 500 °C. The concentration of Eu 3+ ions was set to be 1 mol% and that of the Li + ions was in the range of 0.5–5 mol% to investigate the site occupancy preference and charge compensation co-doping. The structural and morphological properties of the obtained samples were determined by using XRD (X-ray powder diffraction) and TEM (transmission electron microscopy) techniques as well as IR (infrared) and micro-Raman spectroscopy. The particle size was verified and calculated by the Rietveld method being in the range of 70–95 nm. The luminescence properties (the emission, excitation spectra and emission kinetics) of the Eu 3+ ion-doped fluorapatite depending on the co-dopant (Li + ions) were recorded. Significantly, fluorescence quenching by OH − groups was eliminated by F - ions and the luminescence intensity was enhanced by co-doping with Li + ions. The simplified Judd–Ofelt (J–O) theory has been performed to explain a detailed analysis of the luminescence spectra.