Ag-SiO_2-CeF_3:Tb^(3+)复合纳米粒子的制备与发光性质  

Preparation and luminescent properties of Ag-SiO_2-CeF_3:Tb^(3+) composite nanoparticles

作　　者：栾丹[1] 刘桂霞[1] 王进贤[1] 董相廷[1] 于文生[1] 

机构地区：[1]长春理工大学应用化学与纳米技术吉林省高校重点实验室,长春130022

出　　处：《复合材料学报》2014年第2期402-407,共6页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51072026;50972020);吉林省科技发展计划重点科技攻关项目(20130206002GX)

摘　　要：采用简单的液相法在室温下制备了均匀球形的Ag-SiO2-CeF3:Tb3+核-壳结构纳米复合发光粒子,并对其结构和性能进行了表征。测试结果表明:Ag-SiO2表面包覆上了结晶良好的六方晶系的CeF3:Tb3+。Ag-SiO2-CeF3:Tb3+纳米复合粒子为球形,尺寸约为45~60nm,该纳米复合粒子与CeF3:Tb3+一样具有良好的特征绿光发射,均以544nm附近的Tb3+的5 D4→7F5跃迁为最强发射峰,内核贵金属Ag纳米粒子对CeF3:Tb3+发光起到了一定的猝灭作用。Ag-SiO2-CeF3:Tb3+复合材料在生物检测、疾病治疗方面具有潜在的应用。Core-shell structure Ag-SiO2-CeF3：Tb3＋ composite luminescent nanoparticles are fabricated via a simple liquid method at room temperature,the structure and properties are characterized.The results show that orthogonal phase CeF3：Tb3＋nanocrystals are coated on the surface of Ag-SiO2.The obtained Ag-SiO2-CeF3：Tb3＋ composites have spherical morphology,the size is about 45-60nm,and the surface is tough.Their photoluminescence properties show to be the same as those of the pure CeF3：Tb3＋,and the strong emission peak is near 544nm which is corresponding to 5 D4→7F5transition of Tb3＋,Ag core quenches the luminescence of CeF3：Tb3＋.This functional AgSiO2-CeF3：Tb3＋ composites would be potentially applied in biology detection and disease therapy fields.

关 键 词：Ag CeF3:Tb3+ 核-壳结构 纳米粒子 荧光性 

分 类 号：TB332[一般工业技术—材料科学与工程] O611.4[理学—无机化学]