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采用溶胶凝胶法一步合成纯相CaFCl:Tb3+纳米粉,376 nm激发下检测到Tb3+的特征发射,Tb3+掺杂物质的量比为25%时发光最强.采用Stober法制备CaFCl:Tb3+@SiO2纳米粉,得到最佳的包覆条件.包覆后样品出现SiO2宽带衍射峰,透射电子显微镜(TEM)显示SiO2已成功包覆到CaFCl表面,解决CaFCl易吸湿的问题,包覆后样品的发射峰强度相对增强.样品的性质为进一步实现CaFCl:Tb3+-Yb3+近红外量子剪裁提供了可能.
The pure CaFCl: Tb3 + @ SiO2 powders were synthesized by sol-gel method in one step, and the emission of Tb3 + was detected at 376 nm with the Tb3 + content of 25%. The Stober method was used to prepare CaFCl: Tb3 + @ SiO2 Nano-powder, the best coating conditions were obtained.The broad-band diffraction peak of SiO2 appeared after the coating, and the transmission electron microscope (TEM) showed that SiO2 was successfully coated on the surface of CaFCl to solve the problem of easy moisture absorption of CaFCl and the emission of the coated sample The intensity of the peak is relatively enhanced.The properties of the sample provide the possibility to further realize the quantum tailoring of CaFCl: Tb3 + -Yb3 + near infrared.