Ag@SiO_2/Eu(Ⅲ)配合物纳米复合颗粒的制备及荧光性能研究  

Preparation and Luminescent Properties of Ternary Complex of Europium Coated Ag@SiO_2 Core-Shell Nanocomposite

作　　者：耿优辉 许申鸿[1] 唐建国[1] 王瑶[1] 黄林军[1] 焦吉庆[1] 刘继宪[1] 黄震[1] 沈文飞[1] 武鹏[1] 辛志超 Laurence A Belfiore 

机构地区：[1]青岛大学化工学院,青岛266071 [2]青岛大学国家重点实验室,杂化材料研究所,青岛266071

出　　处：《材料导报》2014年第8期5-8,共4页Materials Reports

基　　金：国家自然科学基金(51273096;51373081);山东省科技攻关项目(2010GGX10327);青岛市科技计划基础研究项目(12-1-4-2-(5)-jch);青岛市科技计划基础研究项目(12-1-4-2-(8)-jch);青岛市国际合作资助项目(10-1-4-97-hz);国家外专局高端外国专家项目(GDW20123702160)

摘　　要：通过三步反应成功将铕配合物（EuTP）包覆在纳米棱壳结构Ag@SiO2复合颗粒的表面.采用化学还原法制备了粒径25～30 nm且分散性良好的纳米银溶胶;然后采用改进的St（o）ber法制备了壳层厚度在20nm左右的Ag@SiO2复合颗粒;以氧化铕、α-噻吩甲酰三氟丙酮、邻菲罗啉为原料制备EuTP,并成功包覆在核壳结构的表面.分别采用TEM、FTIR、XRD等对样品的结构进行了表征,并通过对比相同浓度的三价铕的配合物EuTP与复合粒子Ag@SiO2@EuTP的荧光发射光谱发现,SiO2壳层厚度在20 nm左右时Eu配合物的荧光强度明显增强,而且随着棱壳结构表面配合物浓度的增大,包覆层的厚度增大,荧光强度也呈现增强趋势,对于稀土的研究具有重要的意义.The europium complex was coated on the surface of core-shell structure Ag@SiO2 nanoparticles successfully by three steps.Firstly,nano silver sol with diameters at 25-30 nm and good dispersion were prepared through chemical reduction method.Then,the Ag@SiO2 composite particles were prepared by a modified St（o）ber method,the thickness of silica shell is about 20 nm.Finally,the europium complex with 2-thenoyltrifluoroacetone （TTA） and 1,10-phenanthroline（phen） was synthesized and coated on the surface of core-shell structure Ag@SiO2 successfully.The structure and compositions of the samples were characterized by transmission electron microscope （TEM）,Fourier transform infrared spectroscopy （FTIR）,X-ray diffraction （XRD）.By comparing the fluorescence emission spectrum of Ag@SiO2@EuTP with europium complex with the same concentration,the prepared structure exhibited a good effect on the fluorescence enhancement of Eu3＋ complex.With the increase of the concentration of EuTP complex on the surface of core-shell structure,fluorescence intensity also shows enhancement to some extent.Therefore,it is very significant to the study of rare earth.

关 键 词：EuTP Ag@SiO2 金属增强荧光 表面等离子体效应 荧光性能 

分 类 号：O614.338[理学—无机化学]