纳米KZnF_3∶Ce^(3+)的制备及其光谱特性  

Synthesis and fluorescence of nano-KZnF_3∶Ce^(3+)

作　　者：朱国贤[1] 闫景辉[2] 莫凤珊[1] 石春山[3] 

机构地区：[1]湛江师范学院生命科学与化学学院,广东湛江524048 [2]长春理工大学材料与化工学院,吉林长春130022 [3]中国科学院长春应用化学研究所稀土化学与物理重点实验室,吉林长春130022

出　　处：《分子科学学报》2007年第1期39-41,共3页Journal of Molecular Science

基　　金：国家自然科学基金资助项目(90201032)

摘　　要：采用微乳液法合成了KZnF3∶Ce3+纳米颗粒.分析了样品的结构与形态,结果表明:所合成的样品为单相,颗粒粒度分布均匀.讨论了光谱特性,并与高温固相法合成的产物作了对比.研究发现KZnF3∶Ce3+纳米晶的发射光谱与体相多晶相比,最强谱峰位置红移约35 nm,谱带半高宽加宽约12 nm.The nanocrystals of KZnF3 ： Ce^3＋ were synthesized in cetyltrimethylammonium bromide （CTAB）/2-octanol/water microemulsion systems. X-ray diffraction（XRD） patterns identified the formation of KZnF3 phase without detectable impurity. Environment scanning electron microscopy（ESEM） images showed that the average sizes of the KZnF3 nanocrystals were 30 nm in diameter. Photoluminescence characteristics of the rare earth ions doped nanoparticles were investigated and compared with that of the sample prepared by solid state reaction at a high temperature. The emission peak of the KZnF3·Ce^3＋ nanoparticles showed obvious red shift compared with polycrystalline products and full width at half maximum（FWHM） of emission band was broaden.

关 键 词：KZNF3 铈离子 纳米晶 荧光光谱 

分 类 号：O640[理学—物理化学]