【摘 要】
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Uniform nanorods of rare earth phosphate (REPO4,RE =La-Gd) nanocrystals were prepared in a properly designed ionic liquid extraction system by a stripping preci
【机 构】
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State Key Laboratory of Rare Earth Resources Utilization,Changchun Institution of Applied Chemistry,
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Uniform nanorods of rare earth phosphate (REPO4,RE =La-Gd) nanocrystals were prepared in a properly designed ionic liquid extraction system by a stripping precipitation method.Rare earth ions were extracted into the organic phase at first;after that,the loaded organic phase was stripped by aqueous solution of PO43-under stirring at room temperature within 5 min.The extractant used here is a bifunctional ionic liquid extractant called [A336][cyanex272].The products are hexagonal phase in crystal structure,and their morphology is nanorods.The diameter of the products is from 30 to 50 nm,and the length increases from 200 nm to 2 μm gradually.Besides,the ionic liquid-absorbed CePO4:Tb3+ nanorods show improved luminescent emitting intensity and lifetime.Based on the results,a possible growth mechanism of the REPO4 (RE =La-Gd) nanorods is proposed,where the extractants here also play roles of structure-directing agents and surfactants during the formation process of nanocrystals.
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