Synthesis of SiO{sub 2}/Y{sub 2}O{sub 3}:Eu core-shell materials and hollow spheres
- Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)
The SiO{sub 2}/Y{sub 2}O{sub 3}:Eu core-shell materials and hollow spheres were first synthesized by a template-mediated method. X-ray diffraction patterns indicated that the broadened diffraction peaks result from nanocrystals of Y{sub 2}O{sub 3}:Eu shells and hollow spheres. X-ray photoelectron spectra showed that the Y{sub 2}O{sub 3}:Eu shells are linked with silica cores by Si-O-Y chemical bond. SEM and TEM observations showed that the size of SiO{sub 2}/Y{sub 2}O{sub 3}:Eu core-shell structure is in the range of 140-180nm, and the thickness of Y{sub 2}O{sub 3}:Eu hollow spherical shell is about 20-40nm. The photoluminescence spectra of SiO{sub 2}/Y{sub 2}O{sub 3}:Eu core-shell materials and Y{sub 2}O{sub 3}:Eu hollow spheres have better red luminescent properties, and the broadened emission bands came from the size effects of nanocrystals composed of Y{sub 2}O{sub 3}:Eu shell.
- OSTI ID:
- 20725947
- Journal Information:
- Journal of Solid State Chemistry, Vol. 178, Issue 5; Other Information: DOI: 10.1016/j.jssc.2005.03.010; PII: S0022-4596(05)00090-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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