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采用NaIO4为氧化剂,通过氧化纳米粒子表面油酸(OA)的方法实现了油相纳米粒子OA/CaF2:Ln3+(Ln=Tb,Ce/Tb)从有机相到水相的转移,相转移后的纳米粒子在水相中具有良好的分散性。用红外光谱(IR)、X-射线衍射分析(XRD)、透射电子显微镜(TEM)、荧光光谱(FS)对所合成的纳米粒子进行了表征和荧光性能研究。结果表明,纳米粒子表面的油酸在氧化过程中生成了9,10-二羟基十八酸;纳米粒子的晶相为CaF2的立方结构,粒径约为10 nm;纳米粒子发射出Tb3+的特征荧光,并且Ce3+的掺杂极大地提高了Tb3+的发光。
Using NaIO4 as oxidant, the transfer of OA / CaF2: Ln3 + (Ln = Tb, Ce / Tb) from the organic phase to the aqueous phase was achieved by oxidizing the oleic acid (OA) Nanoparticles in the water phase has good dispersion. The synthesized nanoparticles were characterized and characterized by means of IR, XRD, TEM and FS. The results showed that oleic acid on the surface of nanoparticles produced 9,10-dihydroxyoctadecanoic acid during the oxidation process. The crystal phase of the nanoparticles was a cubic structure of CaF2 with a particle size of about 10 nm. The nanoparticles emitted Tb3 + Fluorescence, and the doping of Ce3 + greatly enhanced the luminescence of Tb3 +.