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采用同轴静电纺丝技术,以氧化钇、氧化铕、正硅酸乙酯(C8H20O4Si)、无水乙醇、PVP和DMF为原料,成功制备出大量的Y2O3:Eu3+@SiO2豆角状纳米电缆.用TG-DTA,XRD,SEM,TEM和荧光光谱等分析技术对样品进行了系统地表征.结果表明,得到的产物为Y2O3:Eu3+@SiO2豆角状纳米电缆,以无定型SiO2为壳层,晶态Y2O3:Eu3+球为芯,电缆直径约为200nm,内部球平均直径约150nm,壳层厚度约为25nm,电缆长度>300μm.纳米电缆内部为球状结构,沿着纤维长度方向有序排列,形貌均一.Y2O3:Eu3+@SiO2豆角状纳米电缆在246nm紫外光激发下,发射出Eu3+离子特征的波长为614nm的明亮红光.对其形成机理进行了初步讨论.
A large number of Y2O3: Eu3 + @ SiO2 Beans nanocables were prepared successfully by coaxial electrospinning using yttrium oxide, europium oxide, tetraethylorthosilicate (C8H20O4Si), absolute ethanol, PVP and DMF as starting materials The samples were systematically characterized by TG-DTA, XRD, SEM, TEM and fluorescence spectroscopy. The results showed that the product was Y2O3: Eu3 + @ SiO2 beans angular nanocables with amorphous SiO2 as shell, Y2O3: Eu3 + balls as core, the diameter of cable is about 200nm, the average diameter of inner sphere is about 150nm, the thickness of shell is about 25nm and the length of cable is more than 300μm. The internal structure of nanowires is spherical and arranged along the length of fiber. Y2O3: Eu3 + @ SiO2 beans nanocables emit bright red light with the wavelength of 614nm, which is characterized by Eu3 + ions under the excitation of 246nm UV light.The formation mechanism of the Eu3 + @ SiO2 is discussed preliminarily.