Tb^(3+)掺杂CePO_4花状团簇的控制合成及发光性能  

Hydrothermal Synthesis and Luminescence Properties of CePO_4∶Tb Flower-Like Clusters

作　　者：宝金荣[1] 朱晓伟[2] 金淑新[1] 吕跃[1] 熊利超[1] 李常福[1] 李文先[1] 

机构地区：[1]内蒙古大学化学化工学院,内蒙古呼和浩特010021 [2]内蒙古医学院,内蒙古呼和浩特010110

出　　处：《光谱学与光谱分析》2013年第1期27-30,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20861005);内蒙古自然科学基金项目(2011BS0801);内蒙古大学高层次人才引进科研启动基金项目资助

摘　　要：在无模板条件下,通过调节Tb3+的浓度水热法控制合成了CePO4∶Tb花状团簇。花状团簇由直径为80～90nm、长度约为1μm的纳米线组成。利用X射线衍射(XRD)、场发射扫描电镜(FE-SEM)和荧光光谱分析了产物的相结构、晶粒尺寸、形貌及发光性能。当Ce3+/Tb3+摩尔比为0.850∶0.150时,Tb3+在过量的磷酸体系中诱导纳米线组装生长成花状团簇。发现反应物Ce3+/Tb3+摩尔比和磷酸浓度影响产物形貌的控制合成。并推测了花状团簇的生长机制。产物CePO4∶Tb的荧光性质测试表明,当Ce3+/Tb3+摩尔比为0.850∶0.150时,所合成的花状团簇的发射强度达到最大值,Tb3+的掺入量继续增加其发光强度迅速降低。Tb3＋-doped CePO4 flower-like clusters were hydrothermally synthesized without using any template or surfactant by varying the reactant Tb3＋ cation concentration.It was observed that the flower-like clusters were composed by nanowires with a diameter of about 80~90 nm and lengths up to 1 μm.The structures,morphologies,sizes and luminescence properties of the products were studied by X-ray powder diffraction（XRD）,field-emission scanning electronic microscopy（FE-SEM）,and luminescence spectra.With the reactant Ce3＋/Tb3＋ molar ratio of 0.850∶0.150,the uniform flower-like clusters were actually composed of a self-assembly of the oriented nanowires through an Tb3＋-induced in the excessive PO3-4.It was found that the reactant Ce3＋/Tb3＋ molar ratio and phosphoric acid played key roles in the morphology control of the product.A possible formation mechanism for the flower-like morphology was also proposed.The luminescence properties of CePO4∶Tb flower-like cluster were performed,indicating that the strongest emission intensity was reached with 0.850∶0.150 molar ratios of Ce3＋/Tb3＋.

关 键 词：CePO4∶Tb 花状团簇 水热合成 发光 

分 类 号：O614.3[理学—无机化学]