Abstract
Uniform monodisperse LuPO4:Eu3+/Tb3+ hollow microspheres with diameters of about 2.4 µm have been successfully synthesized by the combination of a facile homogeneous precipitation approach, an ion-exchange process and a calcination process. The possible formation mechanism for the hollow microspheres was presented. Furthermore, the luminescence properties revealed that the LuPO4:Eu3+ and LuPO4:Tb3+ phosphors show strong orange-red and green emissions under ultraviolet excitation, respectively, which endows this material with potential application in many fields, such as light display systems and optoelectronic devices. Since the synthetic process can be carried out at mild conditions, it should be straightforward to scale up the entire process for large-scale production of the LuPO4 hollow microspheres. Furthermore, this general and simple method may be of much significance in the synthesis of many other inorganic materials.
Highlights
Nowadays, rare earth luminescent micro/nanomaterials which have lots of excellent physical and chemical properties arising2017 The Authors
The luminescence properties revealed that the LuPO4:Eu3+ and LuPO4:Tb3+ phosphors show strong orange-red and green emissions under ultraviolet excitation, respectively, which endows this material with potential application in many fields, such as light display systems and optoelectronic devices
Among the various core templates, considerable research efforts have been devoted to using colloid polystyrene (PS) as template to synthesize hollow spheres, because they can be conveniently removed by selective dissolution in an appropriate solvent or by calcination at elevated temperature in air
Summary
Rare earth luminescent micro/nanomaterials which have lots of excellent physical and chemical properties arising. To the best of our knowledge, there have been few reports on the synthesis of uniform, well-dispersed micrometre-scaled rare earth-doped LuPO4 hollow spheres and their corresponding luminescence properties. The special structural geometry and excellent photoluminescent properties of the as-obtained LuPO4 hollow microspheres will have promising potential to serve as solid-state lasers and display devices. This synthetic methodology may be promising for the synthesis of other hollow spherical materials because of its simplicity and the low cost of the starting reagents
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