期刊
NANOSCALE
卷 9, 期 41, 页码 15974-15981出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr06210a
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资金
- National Natural Science Foundation of China [21401103, 21371095]
- National Basic Research Program of China (973 Program) [2015CB932200]
- Natural Science Foundation of the Jiangsu Province [BM2012010, BE2015699, BL2014075]
The synthesis of REF3 (RE = La-Lu, Y) nanocrystals with controlled phase structures has so far remained a challenge. Herein we have developed a one-for-all synthetic procedure that allows the successful synthesis of REF3 nanocrystals in a controlled manner. Experimental results showed that the radius of RE ions determines the phase structure: pure hexagonal REF3 (RE = La-Eu), a mixture of hexagonal and orthorhombic REF3 (RE = Gd), and pure orthorhombic REF3 (RE = Tb-Lu, Y) nanocrystals are obtained along with the decrease of the ionic radius. As Gd is positioned exactly in the middle of the lanthanides row, GdF3 nanocrystals were used as a model to further investigate how the molar ratio of F-:Gd3+, the doping of RE ions with different ionic radii, and the doping concentration of certain RE ions affects the crystal structure of the final product.
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