钒磷酸钇论文稀土掺杂钒磷酸钇低维纳米材料的制备及发光性质

1、钒磷酸钇论文：稀土掺杂钒磷酸钇低维纳米材料的制备及发光性质【中文摘要】X0.4时,YPxV1-xO4:Dy3+发出较好的白光；X越低,YPxV1-xO4:Eu3+的色纯度越好。【英文摘要】Rare earth ions activated YVO4 phosphors have received more and more attention in recent years owing to their high luminescent intensities and stability under UV excitation. By partial replacement of VO43-

2、ions with PO43- ions, a new series of Ln-doped yttrium phosphate-vanadates (YPxV1-xO4) have been obtained with better luminescent properties. YPxV1-xO4:Eu3+ has been proved to be a new potential red phosphor for plasma display panel (PDP). Dy3+-doped YPxV1-xO4 is a potential white phosphor due to it

3、s yellow and blue emissions. Although the investigations on YVO4:Ln and YPxV1-xO4:Ln phosphors are extensive, little study has been reported on synthesis of them by combustion method and electrospinning process. It will be an important and novel research subject.In this work, YPxV1-xO4:Dy3+ nanomate

4、rials were synthesized by combustion method. YPxV1-xO4:Dy3+, YPxV1-xO4:Eu3+ nanofibers and nanobelts were prepared by a combination method of sol-gel process and electrospinning. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric-differential thermal analysis

5、 (TG-DTA), scanning electron microscopy (SEM), and photoluminescence (PL) were used to characterize the resulting samples. The meaningful results are indicated as below:(1) YPxV1-xO4:Dy3+ (X=0,0.2,0.4,0.6,0.8,1) phosphors were prepared by combustion method. The results indicated that grains with sph

6、erical morphology are non-agglomeration, the average size is 61 nm. With the increase of X value, the crystallite size, the emission intensity and the yellow (4F9>6H13/2)-to-blue (4F9/26H15/2) intensity ratio of Dy3+ decrease, whereas the luminescent intensity of VO43- increases. The phosphor wer

7、e found to yield white light when the value of X in the range of 0.2 to 0.4.(2) YPxV1-xO4:Dy3+ and YPxV1-xO4:Eu3+ (X=0,0.2,0.4,0.6,0.8) nanobelts were prepared by electrospinning process for the first time, and the nanofibers were also synthesized to compare. The characteristics of them were similar

8、 while the nanobelts have a higher PL intensity than that of nanofibers. With the increase of X value, the crystallite size, the emission intensity, the yellow (4F9/26H13/2)-to-blue (4F9/26H15/2) intensity ratio of Dy3+ and the red (5D07F2)- to-orange (3D07F1) intensity ratio of Eu3+ decrease, where

9、as the luminescent intensity of VO43- increases. In addition, YPxV1-xO4:Dy3+ were found to yield white light when the value of X in the range of 0.2 to 0.4, and with the increase of X value, the color purity of YPxV1-xO4:Eu3+ decreases.【关键词】钒磷酸钇 燃烧法 静电纺丝法 纳米纤维 纳米带 白光【英文关键词】Yttrium phosphate-vanadate

10、 Combustion Electrospinning Nanofibers Nanobelts White light【目录】稀土掺杂钒磷酸钇低维纳米材料的制备及发光性质摘要4-5ABSTRACT5目录6-8第一章 绪论8-201.1 稀土发光的基本原理8-91.2 纳米稀土钒酸盐的研究进展9-161.2.1 高温固相反应法101.2.2 沉淀法101.2.3 溶胶-凝胶法10-111.2.4 水热法与溶剂热法111.2.5 静电纺丝法11-151.2.6 燃烧法15-161.3 纳米稀土钒磷酸盐的研究进展161.4 CIE-1931表色系统16-191.4.1 CIE-RGB表色系统16-

11、171.4.2 CIE-xyY表色系统17-191.5 本文研究的目的和意义19-20第二章 实验试剂、仪器及表征方法20-222.1 主要实验试剂202.2 实验仪器202.3 表征方法20-222.3.1 差热-热重(TG-DTA)分析202.3.2 X射线衍射(XRD)分析20-212.3.3 场发射扫描电子显微镜(FE-SEM)分析212.3.4 红外光谱分析(FTIR)212.3.5 荧光光谱分析212.3.6 CIE-xyY色度图分析21-22第三章 YP_XV_(1-X)O_4:Dy(3+)纳米粒子的制备与表征22-373.1 概述223.2 实验部分22-233.3 YPO_4

12、:Dy_(0.01)的表征与分析23-253.3.1 X射线衍射分析233.3.2 荧光光谱分析23-253.4 YP_XV_(1-X)O_4:Dy_(0.01)的表征与分析(0X0.8)25-343.4.1 X射线衍射分析25-283.4.2 红外光谱分析283.4.3 扫描电镜和能量色散谱分析28-293.4.4 荧光光谱分析29-323.4.5 CIE-1931 xyY表色系统32-343.5 YP_(0.7)V_(0.3)O_4:Dyx的表征与分析34-353.5.1 荧光光谱分析34-353.5.2 CIE-1931 xyY表色系统353.6 本章小结35-37第四章 YP_XV_(

13、1-X)O_4:Dy(3+)纳米纤维与纳米带的制备与表征37-544.1 概述374.2 实验部分37-384.2.1 YP_XV_(1-X)O_4:Dy(3+)纳米纤维的制备384.2.2 YP_XV_(1-X)O_4:Dy(3+)纳米带的制备384.3 YP_XV_(1-X)O_4:Dy_(0.01)纳米纤维的表征与分析(0X0.8)38-474.3.1 热分析38-394.3.2 X射线衍射分析39-404.3.3 红外光谱分析40-424.3.4 扫描电镜和能量色散谱分析42-444.3.5 荧光光谱分析44-464.3.6 CIE-1931 xyY表色系统46-474.4 YP_XV

14、_(1-X)O_4:Dy_(0.01)纳米带的表征与分析(0X0.8)47-524.4.1 X射线衍射分析47-484.4.2 红外光谱分析484.4.3 扫描电镜分析48-504.4.4 荧光光谱分析50-514.4.5 CIE-1931 xyY表色系统51-524.5 YP_XV_(1-X)O_4:Dy_(0.01)纳米纤维与纳米带发光强度的比较524.6 本章小结52-54第五章 YP_XV_(1-X)O_4:Eu(3+)纳米纤维与纳米带的制备与表征54-685.1 概述545.2 实验部分54-555.2.1 YP_XV_(1-X)O_4:Eu(3+)纳米纤维的制备54-555.2.2 YP_XV_(1-X)O_4:Eu(3+)纳米带的制备555.3 YP_XV_(1-X)O_4:Eu_(0.05)纳米纤维的表征与分析(0X0.8)55-625.3.1 X射线衍射分析55-575.3.2 红外光谱分析575.3.3 扫描电镜和能量