Eu^(3+)掺杂LaPO_4-5SiO_2复合材料的结构和发光性能研究  

Study on the structure and luminescence property of Eu^(3+)-doped LaPO_4-5SiO_2 composite materials

作　　者：王艳鑫[1] 王喜贵[1] 

机构地区：[1]内蒙古师范大学化学与环境科学学院,功能材料物理与化学自治区重点实验室,呼和浩特010022

出　　处：《化工新型材料》2015年第1期80-83,共4页New Chemical Materials

基　　金：内蒙古自治区高等学校科学研究项目(NJZY13046);内蒙古师范大学"十百千"人才工程第二层次人选(学科带头人)研究基金项目(RCPY-2-2012-K-046);国家自然科学基金资助项目(21261010)

摘　　要：采用溶胶-凝胶法在常温下制备了稀土Eu3+掺杂的以LaPO4-5SiO2为复合基质的发光材料,并通过DTATG、XRD、TEM、IR、荧光光谱对材料的结构和发光性能进行了测试和分析。DTA-TG谱图分析显示,样品在84℃和245℃左右出现明显的失重现象,对应于凝胶中的吸附水、有机物的挥发和结晶水的分解。XRD图谱显示,复合基质中LaPO4主要为六方相结构,与纯LaPO4为单斜相结构不同,说明SiO2的加入改变了LaPO4的结构和配位构型。TEM显示材料形貌为长约50nm,直径10nm左右的棒状结构,电子衍射谱图显示材料为多晶结构。IR图谱显示,样品中主要存在Si-O-Si键和O-P-O键。荧光光谱图显示,在612nm监测波长下,最佳激发波长为395nm,Eu3+的最佳掺杂浓度为7.00%(at%),最佳退火温度为800℃。Eu^3＋-doped LaPO4-5SiO2 composite materials were synthesized by sol-gel method. DTA-TG, XRD, TEM, IR and luminescence spectrum were used to characterize the crystal structure and luminescence properties of the phosphors. The DTA-TG analysis showed that the weightlessness was obvious at the temperature 84℃ and 245℃, which was corresponded to the loss of dissociated water, ethanol and nitric acid. XRD spectrum showed that a hexagonal phase was formed, which was different from the monoclinic phase of composite matrix LaPO4 ,it indicated that the addition of SiO2 could change the coordination configuration of LaPO4. The TEM and electron diffraction spectrum analysis showed that the phosphors were a polymorph of rod-like morphology, which was almost entirely of nanorods with diameters of 10 nm and lengths of 50 nm. The IR spectrum showed that the samples mainly existed the Si-O-Si and O-P-O bonds. The sample＇s excitation spectra was observed at 612 nm and the highest excitation peak appeared at 395 nm. When annealing temperature was increased to 800℃ and the doping concentration of Eua＋ reached 7.00% （at %）, the intensity reached the highest.

关 键 词：溶胶-凝胶法 LaPO4-5SiO2:Eu^3+ 发光材料 

分 类 号：TQ422[化学工程]