论文资料-静电纺丝论文：静电纺丝技术制备La_2M_2O_7(M=Ti,Zr,Sn)：RE(3+)纳米.doc

芇蒁羃芃荿蚆衿芃蒂葿袅节芁蚅螁芁莄薈聿芀蒆螃羅艿薈薆袁芈芈螁螇羅莀薄蚃羄蒂螀羂羃膂薂羈羂莄袈袄羁蒇蚁螀羁蕿蒄聿羀艿虿羅罿莁蒂袁肈蒃蚇螇肇膃蒀蚂肆芅蚆肁肅蒈蒈羇肅薀螄袃肄艿薇蝿肃莂螂蚅肂蒄薅羄膁膄螀袀膀芆薃螆腿莈蝿蚂腿薁薂肀膈芀蒄羆膇莃蚀袂膆蒅蒃螈膅膅蚈蚄芄芇蒁羃芃荿蚆衿芃蒂葿袅节芁蚅螁芁莄薈聿芀蒆螃羅艿薈薆袁芈芈螁螇羅莀薄蚃羄蒂螀羂羃膂薂羈羂莄袈袄羁蒇蚁螀羁蕿蒄聿羀艿虿羅罿莁蒂袁肈蒃蚇螇肇膃蒀蚂肆芅蚆肁肅蒈蒈羇肅薀螄袃肄艿薇蝿肃莂螂蚅肂蒄薅羄膁膄螀袀膀芆薃螆腿莈蝿蚂腿薁薂肀膈芀蒄羆膇莃蚀袂膆蒅蒃螈膅膅蚈蚄芄芇蒁羃芃荿蚆衿芃蒂葿袅节芁蚅螁芁莄薈聿芀蒆螃羅艿薈薆袁芈芈螁螇羅莀薄蚃羄蒂螀羂羃膂薂羈羂莄袈袄羁蒇蚁螀羁蕿蒄聿羀艿虿羅罿莁蒂袁肈蒃蚇螇肇膃蒀蚂肆芅蚆肁肅蒈蒈羇肅薀螄袃肄艿薇蝿肃莂螂蚅肂蒄薅羄膁膄螀袀膀芆薃螆腿莈蝿蚂腿薁薂肀膈芀蒄羆膇莃蚀袂膆蒅蒃螈膅膅蚈蚄芄芇蒁羃芃荿蚆衿芃蒂葿袅节芁蚅螁芁莄薈聿芀蒆螃羅艿薈薆袁芈芈螁螇羅莀薄蚃羄蒂螀羂羃膂薂羈羂莄袈袄羁蒇蚁螀羁蕿蒄聿羀艿虿羅罿莁蒂袁肈蒃蚇螇肇膃蒀蚂肆芅蚆肁肅蒈蒈羇肅薀螄袃肄艿薇蝿肃莂螂蚅肂蒄薅羄膁膄螀袀膀芆薃螆腿莈蝿蚂腿薁薂肀膈芀蒄羆 静电纺丝论文：静电纺丝技术制备La_2M_2O_7（M=Ti，Zr，Sn）：RE(3+)纳米带与发光性质研究【中文摘要】低维纳米材料作为器件和材料的基本构成单元对集成电路和功能性元件的构筑,将起到十分重要的作用,其制备和加工是纳米技术领域的重要组成部分。静电纺丝技术因其高效、操作简单等优点,近年来已成为制备无机氧化物低维纳米材料的重要方法之一。La2M2O7(M=Ti, Zr, Sn)本身具有的光学透明性,稀土离子掺杂La2M2O7(M=Ti,Zr, Sn)的纳米发光材料也受到人们的广泛关注。因此,采用静电纺丝技术制备稀土离子掺杂La2M2O7(M=Ti, Zr, Sn)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无机盐为原料,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/无机盐复合纤维及复合纳米带,经过热处理得到了La2Ti2O7：Eu3+纳米纤维、纳米带,La2Zr2O7纳米纤维,La2Zr207:RE3+(RE=Er, Yb/Er)纳米带、纳米纤维,La2Zr207:RE3+(RE=Eu,Tb)纳米纤维,La2Sn2O7纳米纤维,采用TG-DTA、XRD、FTIR、FESEM、TEM、UV-Vis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La2M2O7(M=Ti, Zr)纳米带为纳米短棒或粒子组成,宽厚比大,平均带宽3-5m,厚度约90-140nm。所制备的稀土离子掺杂的La2M2O7(M=Zr, Sn)纳米纤维尺寸均一,彼此没有交联,没有断裂,纤维直径平均为140-180 nm。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La2M2O7(M=Ti, Zr, Sn)发光或者上转换发光低维纳米材料的性质奠定了一定的基础。【英文摘要】Low-dimensional nanomaterials are the basic component unit of devices and materials, which will play an important role in building integrated circuits and functional devices. The preparation and processing of low-dimensional nanomaterials have become key components in the field of nanotechnology. In recent years, electrospinning technology has been proved to be one of the effective methods to prepare inorganic oxides low-dimensional nanomaterials owing to its high efficiency, simple operation and so on. La2M2O7(M=Ti, Zr, Sn) are important matrixes for luminescence due to its optical transparency. Recently, Low-dimensional La2M2O7(M=Ti, Zr, Sn) luminescent nanomaterials have also aroused a lot of concern from scientists. Therefore, fabrication of rare earth ions-doped La2M2O7(M=Ti, Zr, Sn) 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 inorganic salts as starting materials, and electrospinning technique was used to fabricate PVP/inorganic salts composite nanofibers and composite nanobelts. La2Ti2O7:Eu3+nanobelts and nanofibers, La2Zr2O7 nanofibers, La2Zr207:RE3+(RE=Er, Yb/Er) nanobelts and nanofibers, La2Zr207:RE3+(RE=Eu, Tb) nanofibers, La2Zr2O7 nanofibers 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), UV-Vis absorption spectroscopy (UV-Vis) and fluorescence spectroscopy. The results showed that as-prepared rare earth ions-doped La2M2O7(M=Ti, Zr) nanobelts with large width-to-thickness ratios were composed of nanorods or nanoparticles, the width of nanobelts were 0.45-5m, and the thickness were ca.90-140 nm. The diameters of as-prepared rare earth ions-doped La2M2O7(M=Zr, Sn) nanofibers were in narrow range, and there is no cross-linking among nanofibers, and the diameter was about 140-180 nm. Some meaningful results were obtained, and laid solid foundation for the future study of luminescence or up-conversion luminescence of rare earth ions-doped La2M2O7(M=Ti, Zr, Sn) low-dimensional nanomaterials.【关键词】静电纺丝 纳米带 纳米纤维 La2M2O7（M=Ti,Zr,Sn） 发光材料 稀土离子【英文关键词】Electrospinning Nanobelt Nanofiber La2M2O7（M=Ti,Zr,Sn） Phosphors materials Rare-earth ions【目录】静电纺丝技术制备La_2M_2O_7（M=Ti，Zr，Sn）：RE(3+)纳米带与发光性质研究摘要4-5ABSTRACT5目录6-9第一章 绪论9-271.1 纳米材料10-111.1.1 纳米材料的涵义和分类101.1.2 纳米材料的特性10-111.1.3 纳米材料的应用简介111.2 静电纺丝技术11-151.2.1 静电纺丝技术的基本原理12-131.2.2 静电纺丝技术的影响因素131.2.3 静电纺丝技术的应用与展望13-151.3 La_2M_2O_7(M=Ti,Zr,Sn)材料的研究进展15-241.3.1 层状钙钛矿型La_2Ti_2O_7的研究进展15-201.3.2 La_2M_2O_7(M=Zr,Sn)的研究进展20-241.4 稀土发光材料24-261.4.1 稀土发光过程251.4.2 稀土离子的发光特点251.4.3 常见稀土发光材料25-261.5 本文研究的目的和意义26-27第二章 实验试剂、仪器与表征方法27-292.1 主要实验试剂272.2 实验仪器272.3 表征方法27-292.3.1 差热-热重(TG-DTA)分析272.3.2 X射线衍射(XRD)分析27-282.3.3 红外光谱(FTIR)分析282.3.4 场发射环境扫描电子显微镜(FESEM)分析282.3.5 透射电子显微镜(TEM)分析282.3.6 荧光分谱分析28-29第三章 La_2Ti_2O_7:Eu(3+)纳米带、纳米纤维、粒子的制备与发光性质29-463.1 概述293.2 La_2Ti_2O_7:Eu(3+)纳米带的制备与发光性质29-373.2.1 实验部分293.2.2 结果与讨论29-363.2.3 小结36-373.3 La_2Ti_2O_7:Eu(3+)纳米纤维的制备与发光性质37-423.3.1 实验部分373.3.2 结果与讨论37-423.3.3 小结423.4 La_2Ti_2O_7:Eu(3+)颗粒的制备与发光性质42-463.4.1 实验部分42-433.4.2 结果与讨论43-453.4.3 小结45-46第四章 La_2Zr_2O_7纳米纤维的制备、表征与光催化性质46-534.1 概述464.2 实验部分464.2.1 前驱体溶液的配制464.2.2 静电纺丝技术制备复合纤维464.2.3 La_2Zr_2O_7纳米纤维的制备464.3 结果与讨论46-524.3.1 热分析46-474.3.2 X射线衍射分析47-484.3.3 红外光谱分析484.3.4 场发射扫描电镜分析48-504.3.5 催化性质研究50-524.4 本章小结52-53第五章 La_2Zr_2O_7:RE(3+)(RE=Er,Yb/Er)纳米带、纳米纤维的制备与发光性质53-665.1 概述535.2 La_2Zr_2O_7:Er(3+)纳米带的制备与发光性质53-565.2.1 实验部分53-545.2.2 结果与讨论54-565.2.3 小结565.3 La_2Zr_2O7:Yb(3+)/Er(3+)纳米带的制备与发光性质56-595.3.1 实验部分565.3.2 结果与讨论56-595.3.3 小结595.4 La_2Zr_2O_7:Er(3+)纳米纤维的制备与发光性质59-625.4.1 实验部分59-605.4.2 结果与讨论60-625.4.3 小结625.5 La_2Zr_2O_7:Yb(3+)/Er(3+)纳米纤维的制备与发光性质62-665.5.1 实验部分625.5.2 结果与讨论62-655.5.3 小结65-66第六章 La_2Zr_2O_7:RE(3+)(RE=Eu,Tb)纳米纤维的制备与发光性质66-746.1 概述666.2 La_2Zr_2O_7:Eu(3+)纳米纤维的制备与发光性质66-706.2.1 实验部分666.2.2 结果与讨论66-706.2.3 小结706.3 La_2Zr_2O_7:Tb(3+)纳米纤维的制备与发光性质70-746.3.1 实验部分70-716.3.2 结果与讨论71-736.3.3 小结73-74第七章 La_2Sn_2O_7纳米纤维的制备与光催化性质74-807.1 概述747.2 实验部分747.2.1 前驱体溶液的配制747.2.2 静电纺丝技术制备复合纳米纤维747.2.3 La_2Sn_2O_7纳米纤维的制备747.3