首页 | 本学科首页   官方微博 | 高级检索  
     检索      

EuPO4:Zn@MCM-41的制备和发光性质
引用本文:曹渊,袁庆华,穆小静,徐彦芹,刘柏林.EuPO4:Zn@MCM-41的制备和发光性质[J].无机化学学报,2010,26(12).
作者姓名:曹渊  袁庆华  穆小静  徐彦芹  刘柏林
基金项目:中国博士后自然科学基金,211工程第三期建设项目,中央高校基本科研业务费项目
摘    要:通过微波辅助水热法合成MCM-41介孔材料,经溶胶凝胶组装过程将EuPO4:Zn分散到MCM-41表面上和孔道中,制备成以MCM-41为基质的复合发光材料EuPO4:Zn@MCM-41粉末.通过XRD、FTIR、氮吸附、SEM、HRTEM、EDS对该材料进行了表征,用单因素法探究了原料配比(Eu(NO3)3、Zn(NO3)2的加入量和反应条件(煅烧的温度、时间)对EuPO4:Zn@MCM-41在593 am处发光强度的影响,并研究其影响机理.荧光分析发现,EuPO4:Zn基本不发射荧光,而EuPO4:Zn@MCM-41材料具有蓝光段和红光段的荧光发射,主要发光带以468和593 nm为中心.593 nm处的发射归因于Eu3+的4f组内5D0→7F1跃迁,即Eu3+中心离子所在品格格位对称性决定的磁偶极跃迁.研究表明以MCM-41为载体,能够大大降低颗粒的团聚程度,并使EuPO4:Zn颗粒具有更小的粒径:同时EuPO4:Zn@MCM-41中Eu3+发光巾心具有更大的裂分,MCM-41的纳米孔道使Eu3+的发光中心分离,降低了Eu3+之间电子云之间的重叠,大大减小了荧光的猝灭,因此MCM-41能有效降低Eu3+复合物荧光猝灭.

关 键 词:MCM-41  Eu3+复合物  荧光  制备

Fabrication and Photoluminescence of EuPO4:Zn@MCM-41 Composite
CAO Yuan,YUAN Qing-Hua,MU Xiao-Jing,XU Yan-Qin,LIU Bo-Lin.Fabrication and Photoluminescence of EuPO4:Zn@MCM-41 Composite[J].Chinese Journal of Inorganic Chemistry,2010,26(12).
Authors:CAO Yuan  YUAN Qing-Hua  MU Xiao-Jing  XU Yan-Qin  LIU Bo-Lin
Abstract:MCM-41 was synthesized by microwave assisted hydro-thermal method. The EuPO4:Zn@MCM-41 composite materials were obtained by doping the EuPO4:Zn crystal onto the MCM-41 through a simple Pechini solgel process. The materials were characterized by XRD, N2 adsorption/desorption, FTIR, SEM, TEM, EDS, and photoluminescence (PL) spectraoscopy. The PL spectra reveal that Pure EuPO4:Zn powders do not show any PL emissions, however, EuPO4:Zn@MCM-41 composites show strong blue (468 nm) and orange (593 nm) PL emissions. The main bands at 593 nm are ascribed to the 5D0-7F1 transitions of Eu3+ and are the magnetic-dipole (M1) allowed transition, governed by the symmetry of the Eu3+ centers. The control factors for the PL intensity emitted at 593 nm were investigated by monofactorial analysis on prameters such as the amount of Eu(NO3)3 and Zn(NO3)2, the calcination temperature and calcination time. The PL results show that the dispersing effect of MCM-41 can decrease the agglomeration of EuPO4:Zn particles thus making the particles smaller. Besides, larger splitting of Eu3+ centers and less overlapping of Eu3+ electron atmosphere are achieved by the MCM-41, suggesting that MCM-41 is an effective host for Eu3+ complexes for lowering the luminescence quenching effect.
Keywords:MCM-41  Eu3+ complex  photoluminescence  fabrication
本文献已被 万方数据 等数据库收录!
点击此处可从《无机化学学报》浏览原始摘要信息
点击此处可从《无机化学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号