YPO_4/Eu^(3+)微米束的尿素辅助水热合成及其发光性能  

Synthesis of YPO_4/Eu^(3+) microbundle via urea-assisted hydrothermal route and its luminescent properties

作　　者：王婷[1] 宋荷娟[1] 黄莹[1] 杨兰[1] 周立群[1] 

机构地区：[1]湖北大学化学化工学院,湖北武汉430062

出　　处：《化学研究》2011年第6期73-75,95,共4页Chemical Research

基　　金：湖北省自然科学基金(2010CDB04701);湖北省教育厅科学技术研究项目(D20101011)

摘　　要：以Y(NO3)3、Eu(NO3)3和(NH4)2HPO4为原料,尿素作辅助剂,采用水热法成功制备出束状YPO4/Eu3+荧光粉.利用X射线粉末衍射仪、透射电镜、荧光光谱仪等研究了产物的晶体结构、形貌及发光特性;基于透射电镜分析探讨了YPO4/Eu3+微米束结构的形成机理.结果表明:YPO4/Eu3+属于四方晶系,空间群为I41/amd;其形貌为微米束,长约0.12～0.36μm,宽约0.08～0.16μm.在395nm紫外光激发下,YPO4/Eu3+荧光粉能发出Eu3+离子的特征红色荧光,发射主峰位于618nm,归属于Eu3+离子的5 D0→7F2电偶极跃迁.Bundle-like YPO4/Eu3＋ microarchitectures were successfully synthesized from starting materials Y（NO3）3,Eu（NO3）3 and（NH4）2HPO4 by a urea-assisted hydrothermal method in the presence of urea as an auxiliary agent.The crystal structure,morphology and luminescent properties of the product were analyzed by means of X-ray powder diffraction,transmission electron microscopy and photoluminescence spectrometry.The formation mechanism of YPO4/Eu3＋ bundle-like architecture was proposed based on transmission electron microscopic analysis.Results indicate that YPO4/Eu3＋ belongs to tetragonal crystal system with space group I41/amd.As-synthesized microbundle-like YPO4/Eu3＋ is 0.12-0.36 μm long and 0.08-0.16 μm wide.Under the excitation of ultraviolet light at 395 nm,YPO4/Eu3＋ fluorescent powder exhibits characteristic red emission of Eu3＋ ion and shows the strongest emitting peak at 618 nm,which is assigned to 5D0→7F2 electronic dipole transition of Eu3＋ ion.

关 键 词：YPO4/Eu3+微米束 荧光粉 尿素辅助水热法 合成 发光性能 

分 类 号：O614.33[理学—无机化学]