微乳液体系制备纳米BaF_2和BaF_2∶Ce^(3+)材料

Preparation of BaF_2 and BaF_2:Ce^(3+) Nanoparticles from W/O Microemulsion Systems

在CTAB/正丁醇/正庚烷/水微乳液体系,采用氟化铵和氯化钡为原料制备了纳米氟化钡和掺杂稀土的纳米BaF2:Ce3+材料。经SEM表征,BaF2和BaF2:Ce3+均为均匀的球形纳米粒子,粒径39 nm左右。XRD表征掺杂Ce3+后没有显著改变BaF2晶体的结构。荧光光谱分析,BaF2:Ce3+纳米粒子产生了300 nm～400 nm的宽带发射谱,峰值352 nm,半峰宽约60 nm。BaF2:Ce3+纳米粒子激发带在180 nm～320 nm之间,峰值285 nm。

BaF2 and BaF2 ：Ce3＋ nanoparticles were prepared with ammonium fluoride and barium chloride as raw materi- al from W/O microemulsion systems CTAB/n - butanol/n - heptane/water. BaF2 and BaF2 ： Ce3 ＋ nanoparticles were nano spherical particles, and the diameters of BaF2 and BaF2 ： Ce3 ＋ were about 39 nm by SEM. The crystal structure of the BaF2 ： Ce3 ＋ nanoparticles was the same as the BaF2 nanopartieles by XRD. The BaF2 ： Ce3 ＋ nanopartieles have broadband emission spectrum 300nm ~ 400nm, peaked at 352nm, half - peak - width 6Onto by fluorescence spectra. The BaF2 ： Ce3 ＋ nanoparticles have broadband exciting spectrum 180nm ~ 320nm, peaked at 285nm.