کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1548521 | 997743 | 2012 | 5 صفحه PDF | دانلود رایگان |

Rare earth nanoparticles (RENPs) have great superiority as luminescent materials for broad applications, and a prerequisite for most of their application is to obtain hydrophilic RENPs with efficient luminescence and small diameter (<10 nm). To address this problem, we report a facile one-pot sonochemical route with tetraethylene glycol as the solvent and tetrafluoroborate-based ionic liquid as the fluorine source for the synthesis of LaF3:Ce,Tb as the model of RENPs. LaF3:Ce,Tb nanoparticles with the diameter of about 6 nm were prepared in a very short ultrasound time (10 min). Fourier transform infrared spectrum reveals the presence of tetraethylene glycol ligands on their surface, which confers high solubility of LaF3:Ce,Tb nanoparticles in water. Under 254 nm UV excitation, the aqueous dispersion of LaF3:Ce,Tb nanoparticles exhibits strong green emission with luminescent quantum yield of ∼50%. This work probably contributes to not only the fundamental research of shape-controlled LaF3:Ce,Tb nanoparticles but also new methods of producing other RENPs for broad applications.
Journal: Progress in Natural Science: Materials International - Volume 22, Issue 5, October 2012, Pages 488–492