Gd_2O_3∶RE^(3+)(RE:Eu,Tb)纳米棒的合成与表征

Synthesis and characterization of the nanorods of Gd_2O_3∶RE^(3+)(RE:Eu,Tb)

掺杂Eu和Tb离子的一维稀土氧化物发光材料因具有与其体相材料不同的光谱特性在近年来引起了人们的极大研究兴趣。(Gd0.9Eu0.1)(OH)3和(Gd0.9Tb0.1)(OH)3纳米棒前驱物通过水热法首先被合成,然后经退火处理得到Gd2O3∶RE3+(RE:Eu,Tb)纳米棒。FE-SEM的形貌测试结果表明,Gd2O3∶RE3+(RE:Eu,Tb)纳米棒有约为20～60nm直径和200～500nm长度。XRD的结构测试证实,所得到的Gd2O3∶RE3+(RE:Eu,Tb)纳米棒样品均属于立方晶系。光谱测试结果表明,同体相材料相比,Gd2O3∶RE3+(RE:Eu,Tb)纳米棒的Eu3+和Tb3+的特征发光峰出现了宽化现象,样品的纳米表面效应可能是导致其发光峰宽化的主要原因。

One dimension of the rare earth oxide doped with Eu and Tb fluorescent materials have attracted much research interest over the recent years because of their unique fluorescent properties different from their bulk fluorescent materials.In this article,the （Gd0.9Eu0.1）（OH）3 and （Gd0.9Tb0.1）（OH）3 nanorods precursors were first synthesized using a hydrothermal method,then the Gd2O3∶RE3＋（RE：Eu,Tb） nanorods were prepared through annealing treatment.The testing results of the FE-SEM morphologies showed that Gd2O3∶RE3＋（RE：Eu,Tb） nanorods have diameter about 20-60nm and length ca.200-500nm.The structural measurements of the XRD confirmed that the Gd2O3∶RE3＋（RE：Eu,Tb） nanorods belong to cubic crystal system.The results of the PL measurement indicated that the characteristic emission peaks of Eu3＋ and Tb3＋ in the Gd2O3∶RE3＋（RE：Eu,Tb） nanorods exhibit broadened phenomena as compared with those of their bulk fluorescent materials.Surface effect of the nanomaterials may be mainly responsible for the broadened phenomena of the characteristic emission peaks of Eu3＋ and Tb3＋.