【摘 要】
：
Monodispersed and water-soluble TbF3 nanoparticles were synthesized at a relatively low temperature in aqueous solution using citric acid as an additive,and cha
【机 构】
：
Analytical and Testing Center
论文部分内容阅读
Monodispersed and water-soluble TbF3 nanoparticles were synthesized at a relatively low temperature in aqueous solution using citric acid as an additive,and characterized by X-ray diffraction (XRD),field emission scanning electron microscopy (FE-SEM),Fourier transform infrared spectra (FTIR),photoluminescence (PL) spectra and lifetime.The as-prepared TbF3 nanoparticles had orthorhombic structure and were composed of monodispersed spherical particles with an average particle size of 50 nm.The excitation spectrum of TbF3nanoparticles obtained by monitoring the emission of Tb3+ at 543 nm was composed of the characteristics f-f transition lines within the Tb3+ 4f8 configuration.Under the UV light irradiation,the emission spectrum exhibited four obvious lines centered at 489,543,589,and 618 nm,which was corresponding to the 5D4→TFJ (J=6,5,4,3) transitions of the Tb3+ ions in TbF3 nanoparticles.
其他文献
改革开放至今,我国经济实现了飞速的发展,从整体上看我国的经济正在朝着稳定的方向发展,之所以能取得这一优异成果与国内众多中小型企业的努力是分不开的。在我国各大中小企
建立AA2219铝合金搅拌摩擦焊接的工艺窗口.采用不同的工艺参数如旋转速度和焊接速度来焊接该铝合金.通过对焊接接头的宏观形貌分析,建立搅拌摩擦焊的工艺窗口.通过拉伸试验、
本文从探讨新时期医院规划设计的重要意义出发，详细阐述了医院规划设计中重要性和重要地位。接着笔者又深入分析了当前我国医院规划设计中的问题所在并就现代医院规划设计理念
Binary Ce-Zr (CZ),Pr-Zr (PZ) and ternary Ce-Zr-Pr (CZP) mixed oxides were prepared by an ammonia-aided co-precipitation method,and were aged in a steam/air flow
Er3+ and Li+ codoped Y3Al5O12 (YAG) powders were prepared for a systematic investigation of their upconversion emissions.X-ray diffraction (XRD),upconversion em
we developed a new silicate-based full-color phosphor Ba3Lu2(SiO4)3:Et2+ through solid state reaction.The host crystal structure was isostructural with Ca3Y2(Si
通过湿法球磨制备CoFe2O4-BaTiO3颗粒复合材料,研究材料成分和调制频率与电磁效应的关系.结果表明:电磁效应系数随着调制频率由400 Hz增加到1 000 Hz而增加.由于CoFe2O4的电
Nanocrystalline cubic Y2O3:Eu were prepared by combustion reaction.The crystal structure and morphology were analyzed by means of X-ray diffraction (XRD) and tr
Uniform YF3 nanorods composed ofnanoparticles were successfully prepared via a facile solvothermal method with ethanol as solvent and tetrabutyl ammonium fluori
The water repellence and mechanical properties of the gelatin/Ce(Ⅲ) fiber (GCe fiber) were improved by heat treatment,which was an easy and non-toxic method.Th