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Ag@YF3：Eu^3＋核壳结构纳米材料的制备与性能研究

ISSN号：1001-4861
期刊名称：《无机化学学报》
时间：0
分类：O611.4[理学—无机化学;理学—化学] O614.33[理学—无机化学;理学—化学]
作者机构：[1]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
相关基金：国家自然科学基金（No.51072026,50972020）

作者：栾丹[1], 孙萍[1], 刘桂霞[1], 王进贤[1], 董相廷[1], 于文生[1]

关键词：直接沉淀法, Ag, YF3:Eu3+, 核壳结构, 发光性能, direct precipitation method, Ag, YF3：Eu^3＋, core-shell structure, luminescent property

中文摘要：

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：Eu^3＋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：Eu^3＋。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：Eu^3＋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5D0→7F1磁偶极跃迁为最强发射峰,但是比纯的YF3：Eu^3＋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：Eu^3＋的发光有猝灭作用。

英文摘要：

Ag nanoparticles were successfully synthesized with a high yield by a polyol process, and the uniform spherical Ag@YF3：Eu^3＋ 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：Eu^3＋ 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：Eu^3＋ 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 5D0→7F1 magnetic dipole transition of Eu^3＋, the fluorescent intensity is weaker but the lifetime is stronger than that of the pure YF3：Eu^3＋, which indicates that the fluorescent of YF3：Eu^3＋ is quenched by Ag cores.

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