静电纺丝论文：静电纺丝技术制备稀土离子掺杂La_2Mo_2O_9低维纳米材料与表征

静电纺丝论文：静电纺丝技术制备稀土离子掺杂La_2Mo_2O_9低维纳米材料与表征【中文摘要】目前纳米稀土发光材料是材料科学领域研究的热点之一,具有广阔的应用前景。钼酸镧是一种重要的功能材料,它不仅可作为快离子的导体催化剂应用于众多领域,还具有良好的稳定性和有效的能量传递等特点,使其成为一种优良的发光的基体材料。因此,采用静电纺丝技术制备稀土离子掺杂La2Mo2O9低维纳米发光材料将是一个有意义、重要的研究课题。本文中以聚乙烯吡咯烷酮和金属硝酸盐为前驱体,通过溶胶-凝胶过程制备出具有一定粘度的前驱体溶胶,并采用静电纺丝技术制备了PVP/硝酸盐复合纤维及复合纳米带,经过热处理得到了La2Mo2O9、La2Mo2O9：Eu3+、La2Mo2O9：Tb3+、La2Mo2O9：Sm3+、La2Mo2O9：Er3+、La2Mo2O9：Nd3+、La2Mo2O9：Pr3+纳米纤维及多孔纳米带,采用TG-DTA、XRD、FTIR、FESEM、TEM和荧光光谱等技术对样品进行了表征。结果表明,所制备的稀土离子掺杂的La2Mo2O9纳米纤维尺寸均一,彼此没有交联,纤维直径平均为180-220 nm,长度大于100m。所制备的稀土离子掺杂的La2Mo2O9纳米带为多孔结构,宽厚比大,平均带宽5-7m,厚度约130-280 nm,长度大于500m。获得了一些有意义的研究结果,为进一步深入研究稀土离子掺杂的La2Mo2O9发光纳米材料的性质奠定了一定的基础。【英文摘要】Currently, nano rare earth luminescent materials is hot focus for the aspect of material science research, and it is wide range of application prospects for its unique properties.The lanthanum molybdenum is an important functional material, because it is not only applied to many areas of the catalysts as fast ionic conductors, and also has good stability and effective energy transfer characteristics, making it to become an excellent luminous matrix material. Therefore, fabrication of rare earth ions-doped La2Mo2O9 low-dimensional luminescent nanomaterials via electrospinning will be a meaningful subject of significance.In this dissertation, sol-gel process was applied to prepare the precursor sol of certain viscosity using PVP and various nitrate salts as starting materials, and electrospinning technique was used to fabricate PVP/nitrate composite nanofibers and composite nanobelts. La2Mo2O9, La2Mo2O9:Eu3+, La2Mo2O9:Tb3+, La2Mo2O9:Sm3+, La2Mo2O9:Er3+, La2Mo2O9:Nd3+, La2Mo2O9:Pr3+ nanofibers and porous nanobelts were fabricated by calcination of the as-prepared composite nanofibers and composite nanobelts. The samples were characterized by thermogravimetric-differential thermal analysis (TG-DTA), x-ray diffractometry (XRD), Fourier transform infrared spectrometry (FTIR), field emission scanning electron microscope (FESEM), transmission electron microscope (TEM) and fluorescence spectroscopy. The results showed that the diameters of as-prepared rare earth ions-doped La2Mo2O9 nanofibers were in narrow range, and there is no cross-linking among nanofibers, and the diameter was about 180-220 nm, and the length was greater than 100m. The structure of as-prepared rare earth ions-doped La2Mo2O9 nanobelts with large width-to-thickness ratios were porous, the width of nanobelts were 5-7m, and the thickness were ca.130-280 nm, and the length was greater than 500m. Some meaningful results were obtained, and laid solid foundations for the future study of luminescence or up-conversion luminescence of rare earth ions-doped La2Mo2O9 low-dimensional nanomaterials.【关键词】静电纺丝 纳米纤维 纳米带 La2Mo2O9 发光材料 稀土离子【英文关键词】Electrospinning Nanofiber Nanobelt La2Mo2O9 Phosphors materials Rare-earth ion【目录】静电纺丝技术制备稀土离子掺杂La_2Mo_2O_9低维纳米材料与表征摘要4-5ABSTRACT5目录6-10第一章 绪论10-251.1 引言101.2 静电纺丝技术10-201.2.1 静电纺丝技术的起源111.2.2 静电纺丝技术机理11-131.2.3 静电纺丝常用装备13-181.2.4 静电纺丝的影响因素18-191.2.5 静电纺丝技术的应用191.2.6 静电纺丝技术的发展前景19-201.3 稀土发光材料20-221.3.1 稀土发光材料的分类201.3.2 稀土发光材料的应用20-211.3.3 稀土发光材料的制作方法21-221.3.4 纳米稀土发光材料221.4 稀土La_2Mo_2O_9纳米材料22-231.4.1 La_2Mo_2O_9结构特点22-231.5 本课题研究的目的和意义23-25第二章 化学试剂、实验仪器及表征方法25-282.1 主要化学试剂25-262.2 实验仪器与设备262.3 表征方法26-282.3.1 生物显微镜分析262.3.2 X射线衍射(XRD)分析262.3.3 红外光谱(FTIR)分析262.3.4 场发射扫描电子显微镜(FE-SEM)分析26-272.3.5 差热-热重(TG-DTA)分析272.3.6 荧光光谱分析27-28第三章 La_2Mo_2O_9纳米纤维、纳米带的制备与表征28-373.1 引言283.2 实验28-303.2.1 前驱体溶液的配制28-293.2.2 PVP/La(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米纤维的制备293.2.3 La_2Mo_2O_9纳米纤维的制备293.2.4 PVP/La(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米带的制备293.2.5 La_2Mo_2O_9纳米带的制备29-303.3 结果与讨论30-363.3.1 XRD分析30-313.3.2 差热热重分析(TG-DTA)31-323.3.3 FTIR分析32-333.3.4 FESEM分析33-353.3.5 EDS分析35-363.4 本章小结36-37第四章 La_2Mo_2O_9:Er(3+)纳米纤维、纳米带的制备与表征37-454.1 引言374.2 实验37-394.2.1 前驱体溶液的配制37-384.2.2 PVP/La(NO_3)_3+Eu(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米纤维的制备384.2.3 La_2Mo_2O_9:Eu(3+)纳米纤维的制备384.2.4 PVP/La(NO_3)_3+Eu(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米带的制备384.2.5 La_2Mo_2O_9:Eu(3+)纳米带的制备38-394.3 结果与讨论39-444.3.1 XRD分析39-404.3.2 FESEM分析40-424.3.3 EDS分析42-434.3.4 荧光光谱分析43-444.4 本章小结44-45第五章 La_2Mo_2O_9:Tb(3+)纳米纤维、纳米带的制备与表征45-545.1 引言455.2 实验45-475.2.1 前驱体溶液的配制45-465.2.2 PVP/La(NO_3)_3+Tb(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米纤维的制备465.2.3 La_2Mo_2O_9:Tb(3+)纳米纤维的制备465.2.4 PVP/La(NO_3)_3+Tb(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米带的制备465.2.5 La_2Mo_2O_9:Tb(3+)纳米带的制备46-475.3 结果与讨论47-525.3.1 XRD分析47-485.3.2 FESEM分析48-505.3.3 EDS分析50-515.3.4 荧光光谱分析51-525.4 本章小结52-54第六章 La_2Mo_2O_9:Sm(3+)纳米纤维、纳米带的制备与表征54-626.1 引言546.2 实验54-566.2.1 前驱体溶液的配制54-556.2.2 PVP/La(NO_3)_3+Sm(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米纤维的制备556.2.3 La_2Mo_2O_9:Sm(3+)纳米纤维的制备556.2.4 PVP/La(NO_3)_3+Sm(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米带的制备556.2.5 La_2Mo_2O_9:Sm(3+)纳米带的制备55-566.3 结果与讨论56-606.3.1 XRD分析566.3.2 FESEM分析56-596.3.3 EDS分析59-606.3.4 荧光光谱分析606.4 本章小结60-62第七章 La_2Mo_2O_9:Er(3+)纳米纤维、纳米带的制备与表征62-697.1 引言627.2 实验62-647.2.1 前驱体溶液的配制62-637.2.2 PVP/La(NO_3)_3+Er(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米纤维的制备637.2.3 La_2Mo_2O_9:Er(3+)纳米纤维的制备637.2.4 PVP/La(NO_3)_3+Er(NO_3)_3+(MH_4)_6Mo_7O_(24)复合纳米带的制备637.2.5 La_2M_o2O_9:Er(3+)纳米带的制备63-647.3 结果与讨论64-687.3.1 XRD分析64-657.3.2 FESEM分析65-677.3.3 EDS分析67-687.4 本章小结68-69第八章 La_2Mo_2O_9:Nd(3+)纳米纤维、纳米带的制备与表征69-778.1 引言698.2 实验69-718.2.1 前驱体溶液的配制69-708.2.2 PVP/La(NO_3)_3+Nd(NO_3)_3+(NH_4)_6Mo_7O_(24)复合纳米纤维的制备708.2.3 La_2Mo_2O_9:Nd(3+)纳米纤维的制备708.2.4 PVP/La(NO_3)_3+Nd(NO_3)3+(NH_4)_6Mo_7O_(24)复合纳米带的制备708.2.5 La_2Mo_2O_9:Nd(3+)纳米带的制备70-718.3 结果与讨论71-758.3.1 XRD分析71-728.3.2 FESEM分析72-748.3.3 EDS分析74-758.3.4 荧光光谱分析758.4 本章小结75-77第九章 La_2Mo_2O_9:Pr(3+)纳米纤维、纳米带的制备与表征77-849.1 引言779.2 实验77-799.2.1 前驱体溶液的配制77-