水热法合成Gd_2O_3∶Dy^(3+)纳米棒及发光性能  

Synthesis and Luminescent Properties of Gd_2O_3∶Dy^(3+) Nanorods by Hydrothermal Method

作　　者：翟永清[1] 刘亚红[1] 游志江[1] 邢瑞思[1] 艾肖[1] 

机构地区：[1]河北大学化学与环境科学学院,保定071002

出　　处：《人工晶体学报》2011年第6期1440-1445,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(20675023)资助项目

摘　　要：以氢氧化钠为沉淀剂,采用水热方法制备了Gd2O3∶Dy3+纳米棒。通过红外光谱、扫描电镜及X射线衍射对前驱体及目标产物的物相结构、微观形貌进行了分析表征,通过荧光分光光度计测试了所得Gd2O3∶Dy3+的发光性能。结果表明:水热前驱体为六方相氢氧化钆(镝),经900℃焙烧得立方相的Gd2O3∶Dy3+。所得Gd2O3∶Dy3+为直径约100 nm,长度约500 nm～1μm的纳米棒。其激发光谱由一系列激发峰组成,峰值分别位于239 nm、279 nm、314 nm、353 nm,最强峰位于279 nm处;发射光谱主要由两部分组成,分别为460～500 nm的蓝光和560～590 nm的黄绿光发射峰(带),均属于Dy3+的特征发射,且后者的强度远高于前者,因此,在紫外光激发下呈黄光发射。Abstract：Gd2O3：Dy^3＋ nanorods were synthesized by hydrothermal method using sodium hydroxide as precipitation agent. The phase structure and micregraphs of the precursor and the target product were characterized by FTIR, SEM and XRD. The luminescent properties of the phosphors were investigated byfluorescence spectrophotometer. The results show that the obtained precursor is hexagonal phase gadolinium （dysprosium） hydroxide. Gd2O3：Dy^3＋ with pure cubic phase could be obtained after the precursors were calcined at 900℃. The Gd2O3：Dy^3＋samples are nanorods with a diameter about 100 nm and a length about 500 nm-1μm. The excitation spectrum is composed of a series of peaks located at 239 nm, 279 nm, 314 nmand 353 nm, respectively, and the strongest peak is at 279 nm. The emission spectrum mainly consists of two parts, the blue emitting peaks （band） in the range of 460-500 nm and the yellow-green emitting peaks （band） in the range of 560-590 nm. All the peaks （bands） are ascribed to the characteristic emission of Dy^3＋. The intensity of the latter emitting peaks （band） was much stronger than that of the former; therefore, the samples show yellow-light emitting under the excitation of ultraviolet light.

关 键 词：Gd2O3∶Dy3+ 纳米棒 水热合成 光致发光 

分 类 号：O614[理学—无机化学]