WO3/YF3∶Eu^3+复合纳米材料的制备与发光性能

Preparation and Luminescence Property of WO_3/YF_3∶Eu^(3+) Composite Nanomaterial

采用直接沉淀法制备了WO_3/YF_3∶Eu^(3+)复合纳米材料,并对其结构、组成、形貌和发光性能进行了研究。XRD分析表明:复合纳米材料由纳米粒子WO3和结晶良好的正交晶系的YF3∶Eu^(3+)组成。SEM照片表明:片状WO3颗粒表面沉积了分散性较好、粒径均匀(尺寸为10~50 nm)的YF3∶Eu3纳米颗粒。荧光光谱分析表明:该复合纳米材料具有良好的发光性,以593 nm附近的5D0→7F1磁偶极跃迁为最强发射峰,与纯的YF3∶Eu^(3+)相比WO_3/YF_3∶Eu^(3+)发光强度明显增强,表明具有表面等离子共振效应的WO3纳米粒子对壳层的YF3∶Eu^(3+)起到发光增强作用。

WO3/YF3∶Eu^3+nanocomposite materials were prepared by direct precipitation method and its composition,structure,morphology and luminescent properties were investigated.XRD analysis showed that the nanocomposite is composed of WO3 and orthorhombic YF3∶Eu^3+.SEM showed that the nanocomposite is irregular flake structure,and it is obvious that many YF3∶Eu^3+particles are uniformly deposited on the surface of WO3 flake.The particle size of YF3∶Eu^3+nanoparticles is in the range of 10~50 nm.PL indicated that the strongest emission peak at 593 nm can be assigned to magnetic dipole transition of 5D0→7F1.Compared with the pure YF3∶Eu^3+,the luminescence intensity of WO3/YF3∶Eu^3+is obviously enhanced.It showed that the WO3 with local surface plasmon resonance(LSPR)play a role in enhancing the luminescence properties of the shell YF3∶Eu^3+.