Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 22, Issue 5, Pages 488-492Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2012.07.007
Keywords
Sonochemical synthesis; LaF3:Ce,Tb; Nanoparticles; Luminescence
Funding
- National Natural Science Foundation of China [21107013, 21171035, 50902021, 51272299]
- Specialized Research Fund for the Doctoral Program of Higher Education [20090075120014, 20110075120012]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, Shanghai Rising-Star Program [11QA1400100]
- Innovation Program of Shanghai Municipal Education Commission [13ZZ053]
- Fundamental Research Funds for the Central Universities
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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 similar to 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. (c) 2012 Chinese Materials Research Society. Production and hosting by Elsevier Ltd. All rights reserved.
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