ATP/CaF_2∶Ln^(3+)(Ln∶Eu,Tb,Ce/Tb)纳米粒子的制备及其荧光性能  

Preparation and Fluorescent Properties of ATP/CaF_2∶Ln^(3+)(Ln∶Eu,Tb,Ce/Tb) Nanoparticles

作　　者：宋立美[1] 张美娜[1] 李江涛[1] 白洁琼[1] 

机构地区：[1]西安文理学院化学工程学院陕西省表面工程与再制造重点实验室,陕西西安710065

出　　处：《材料科学与工程学报》2017年第3期438-442,共5页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(21541009);西安市科技计划创新基金资助项目(2016CXWL10)

摘　　要：采用两步法制备了三磷酸腺苷二钠(ATP)修饰的ATP/CaF_2∶Ln^(3+)(Ln∶Eu,Tb,Ce/Tb)纳米粒子。采用红外光谱(IR)、X-射线衍射分析(XRD)、透射电子显微镜(TEM)对所合成的纳米粒子进行结构表征,并通过荧光光谱(FS)研究了纳米粒子的荧光性能。结构研究结果表明,ATP成功地包覆在纳米粒子的表面,纳米粒子的晶相为CaF_2的立方结构,ATP/CaF_2∶Eu^(3+)、ATP/CaF_2∶Tb^(3+)、ATP/CaF_2∶Ce^(3+)/Tb^(3+)纳米粒子的平均粒径分别约为14nm、15nm、11nm。荧光性能研究表明,ATP/CaF_2∶Eu^(3+)、ATP/CaF_2∶Tb^(3+)纳米粒子基本不发射稀土离子的特征荧光,而发射出修饰剂ATP的荧光,由于Ce^(3+)对Tb^(3+)的敏化作用,ATP/CaF_2∶Ce^(3+)/Tb^(3+)纳米粒子发射出Tb^(3+)的特征荧光。ATP/CaF2∶Ln3＋（Ln∶Eu,Tb,Ce/Tb）nanoparticles were prepared with adenosine disodium triphosphate（ATP） as surface modification using two-step method.Structure characterization of the nanoparticles was studied by infrared spectroscopy（IR）,X-ray diffraction（XRD）and transmission electron microscopy（TEM）.The results show that ATP is successfully capped on the surface of nanoparticles,the nanoparticles can be indexed as pure cubic CaF2 phase,the size of the nanoparticles is about 14nm（Eu3＋）,15nm（Tb3＋）and 11nm（Ce3＋/Tb3＋）,respectively.Fluorescent properties studied by fluorescent spectra（FS）show that ATP/CaF2∶Eu3＋ and ATP/CaF2∶Tb3＋ nanoparticles almost do not emit the characteristic fluorescence of corresponding lanthanide ions,but emit fluorescence of ATP,and ATP/CaF2∶Ce3＋/Tb3＋nanoparticles emit the characteristic fluorescence of Tb3＋ ions due to the sensitization of Ce3＋ to Tb3＋ ions.

关 键 词：三磷酸腺苷二钠(ATP) 稀土离子 表面修饰 荧光 

分 类 号：O614.33[理学—无机化学]