State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
J Colloid Interface Sci. 2011 Mar 1;355(1):89-95. doi: 10.1016/j.jcis.2010.11.082. Epub 2010 Dec 4.
One-dimensional Ca(4)Y(6)(SiO(4))(6)O: Ln(3+) (Ln=Eu, Tb) microfibers were fabricated by a simple and cost-effective electrospinning method. X-ray diffraction (XRD) pattern and high-resolution transmission electron microscopy (HRTEM) confirmed that the fibers were composed of hexagonal Ca(4)Y(6)(SiO4)(6)O phase. Thermogravimetric and differential scanning calorimetry (TG-DSC) results showed that the Ca(4)Y(6)(SiO4)(6)O phase began to crystallize at 740°C. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results indicated that the diameter of as-prepared microfibers ranged from 390 to 900 nm and the diameter of the microfibers annealed at 1000°C ranged from to 120 to 260 nm. Under ultraviolet and low-voltage electron beams (3-5 kV) excitation, the Ca(4)Y(6)(SiO(4))(6)O: Ln(3+) (Ln=Eu, Tb) samples showed the red and green emission, corresponding to (5)D(0)→(7)F(2) transition of Eu(3+) and (5)D(4)→(7)F(5) transition of Tb(3+), respectively.
一维 Ca(4)Y(6)(SiO(4))(6)O:Ln(3+)（Ln=Eu、Tb）微纤维通过简单且经济高效的静电纺丝法制备。X 射线衍射（XRD）图谱和高分辨率透射电子显微镜（HRTEM）证实纤维由六方相 Ca(4)Y(6)(SiO4)(6)O 组成。热重-差示扫描量热法（TG-DSC）结果表明 Ca(4)Y(6)(SiO4)(6)O 相于 740°C 开始结晶。扫描电子显微镜（SEM）和透射电子显微镜（TEM）结果表明，所制备的微纤维的直径范围为 390-900nm，在 1000°C 下退火的微纤维的直径范围为 120-260nm。在紫外光和低电子束（3-5kV）激发下，Ca(4)Y(6)(SiO(4))(6)O:Ln(3+)（Ln=Eu、Tb）样品分别显示出 Eu(3+)的(5)D(0)→(7)F(2)跃迁和 Tb(3+)的(5)D(4)→(7)F(5)跃迁对应的红色和绿色发射。
