Ag@YF3:Eu3+核壳结构纳米材料的制备与性能研究
Preparation and Properties of Ag@YF3:Eu3+ Core-Shell Structural Nanomaterials
作者单位E-mail
栾丹 长春理工大学化学与环境工程学院, 应用化学与纳米技术吉林省高校重点实验室, 长春 130022  
孙萍 长春理工大学化学与环境工程学院, 应用化学与纳米技术吉林省高校重点实验室, 长春 130022  
刘桂霞 长春理工大学化学与环境工程学院, 应用化学与纳米技术吉林省高校重点实验室, 长春 130022 liuguixia22@yahoo.com.cn 
王进贤 长春理工大学化学与环境工程学院, 应用化学与纳米技术吉林省高校重点实验室, 长春 130022  
董相廷 长春理工大学化学与环境工程学院, 应用化学与纳米技术吉林省高校重点实验室, 长春 130022  
于文生 长春理工大学化学与环境工程学院, 应用化学与纳米技术吉林省高校重点实验室, 长春 130022  
摘要: 采用乙二醇法制备了单质Ag纳米粒子,并通过直接沉淀法合成了均匀球形的Ag@YF3:Eu3+核壳结构复合纳米发光粒子,对产物的结构和性能进行了表征。XRD分析表明:Ag表面包覆上了结晶良好的正交晶系的YF3:Eu3+。TEM照片表明:所得的纳米复合粒子具有明显的核壳结构和均匀的球形,中间Ag粒子的尺寸在80~100 nm之间,Ag@YF3:Eu3+的粒径尺寸约为150~180 nm,表面粗糙且包覆完全。电子衍射表明复合样品为多晶。荧光光谱表明:该纳米复合粒子具有良好的发光性,以593 nm附近的5D07F1磁偶极跃迁为最强发射峰,但是比纯的YF3:Eu3+的发光强度要弱,其荧光寿命有所增强,这表明Ag纳米粒子对外层的YF3:Eu3+的发光有猝灭作用。
关键词: 直接沉淀法  Ag  YF3:Eu3+  核壳结构  发光性能
基金项目: 国家自然科学基金(No.51072026,50972020)资助项目。
Abstract: Ag nanoparticles were successfully synthesized with a high yield by a polyol process, and the uniform spherical Ag@YF3:Eu3+ core-shell structural nanomaterials were fabricated via a facile direct precipitation method, then the structure and properties were characterized. XRD patterns show that the orthogonal phase YF3:Eu3+ nanocrystals are coated on the surface of Ag cores. TEM images indicate that the obtained composites have obvious core-shell structure and uniform spherical morphology, the diameter of the Ag core is of 80~100 nm, the size of the Ag@YF3:Eu3+ composite is about 150~180 nm, the surface is rough and the coating is complete. Electron diffraction pattern indicates that the samples are polycrystalline. The photoluminescence spectra indicate that the core-shell structural composites have good luminescence, the strong emission peak is near 593 nm corresponding to 5D07F1 magnetic dipole transition of Eu3+, the fluorescent intensity is weaker but the lifetime is stronger than that of the pure YF3:Eu3+, which indicates that the fluorescent of YF3:Eu3+ is quenched by Ag cores.
Keywords: direct precipitation method  Ag  YF3:Eu3+  core-shell structure  luminescent property
投稿时间:2012-09-10 修订日期:2012-10-26
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栾丹,孙萍,刘桂霞,王进贤,董相廷,于文生.Ag@YF3:Eu3+核壳结构纳米材料的制备与性能研究[J].无机化学学报,2013,29(3):474-478.
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