Citation: LUAN Dan, SUN Ping, LIU Gui-Xia, WANG Jin-Xian, DONG Xiang-Ting, YU Wen-Sheng. Preparation and Properties of Ag@YF3:Eu3+ Core-Shell Structural Nanomaterials[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(3): 474-478. doi: 10.3969/j.issn.1001-4861.2013.00.085
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Ag nanoparticles were successfully synthesized with a high yield by a polyol process, and the uniform spherical Ag@YF3:Eu3+ core-shell structural nanomaterials were fabricated via a facile direct precipitation method, then the structure and properties were characterized. XRD patterns show that the orthogonal phase YF3:Eu3+ nanocrystals are coated on the surface of Ag cores. TEM images indicate that the obtained composites have obvious core-shell structure and uniform spherical morphology, the diameter of the Ag core is of 80~100 nm, the size of the Ag@YF3:Eu3+ composite is about 150~180 nm, the surface is rough and the coating is complete. Electron diffraction pattern indicates that the samples are polycrystalline. The photoluminescence spectra indicate that the core-shell structural composites have good luminescence, the strong emission peak is near 593 nm corresponding to 5D0→7F1 magnetic dipole transition of Eu3+, the fluorescent intensity is weaker but the lifetime is stronger than that of the pure YF3:Eu3+, which indicates that the fluorescent of YF3:Eu3+ is quenched by Ag cores.
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