A Facile Synthesis and Photoluminescent Properties of Redispersible CeF3, CeF3:Tb3+, and CeF3:Tb3+/LaF3 (Core/Shell) Nanoparticles
| Autor: | P. Y. Jia, Y. Chen, Zhijie Wang, C. J. O’Connor, Wei Zhou, Zewei Quan, Cuikun Lin, Yongshi Luo, Jiye Fang, Jun Lin |
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| Rok vydání: | 2006 |
| Předmět: |
Photoluminescence
Materials science Absorption spectroscopy General Chemical Engineering Diethylene glycol Analytical chemistry Nanoparticle Nanotechnology General Chemistry chemistry.chemical_compound Colloid chemistry X-ray photoelectron spectroscopy Nanocrystal Transmission electron microscopy Materials Chemistry |
| Zdroj: | Chemistry of Materials. 18:2030-2037 |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | CeF3, CeF3:Tb3+, and CeF3:Tb3+/LaF3 (core/shell) nanoparticles were prepared by the polyol method and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS), UV−vis absorption spectra, photoluminescence (PL) spectra, and lifetimes. The results of XRD indicate that the obtained CeF3, CeF3:Tb3+, and CeF3:Tb3+/LaF3 (core/shell) nanoparticles crystallized well at 200 °C in diethylene glycol (DEG) with a hexagonal structure. The TEM images illustrate that the CeF3 and CeF3:Tb3+ nanoparticles are spherical with a mean diameter of 7 nm. The growth of the LaF3 shell around the CeF3:Tb3+ core nanoparticles resulted in an increase of the average size (11 nm) of the nanopaticles as well as in a broadening of their size distribution. These nanocrystals can be well-dispersed in ethanol to form clear colloidal solutions. The colloidal solutions of CeF3 and CeF3:Tb3+ show the characteristic emission of Ce3+ 5d−4f (320 nm) and Tb3+ 5D4−7FJ (J = 6−3, with 5D4−7F... |
| Databáze: | OpenAIRE |
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