靜電紡絲論文：靜電紡絲技術(shù)制備稀土離子摻雜La_2Mo_2O_9低維納米材料與表征

靜電紡絲論文：靜電紡絲技術(shù)制備稀土離子摻雜La_2Mo_2O_9低維納米材料與表征【中文摘要】目前納米稀土發(fā)光材料是材料科學(xué)領(lǐng)域研究的熱點(diǎn)之一,具有廣闊的應(yīng)用前景。鉬酸鑭是一種重要的功能材料,它不僅可作為快離子的導(dǎo)體催化劑應(yīng)用于眾多領(lǐng)域,還具有良好的穩(wěn)定性和有效的能量傳遞等特點(diǎn),使其成為一種優(yōu)良的發(fā)光的基體材料。因此,采用靜電紡絲技術(shù)制備稀土離子摻雜La2Mo2O9低維納米發(fā)光材料將是一個(gè)有意義、重要的研究課題。本文中以聚乙烯吡咯烷酮和金屬硝酸鹽為前驅(qū)體,通過(guò)溶膠-凝膠過(guò)程制備出具有一定粘度的前驅(qū)體溶膠,并采用靜電紡絲技術(shù)制備了PVP/硝酸鹽復(fù)合纖維及復(fù)合納米帶,經(jīng)過(guò)熱處理得到了La2Mo2O9、La2Mo2O9：Eu3+、La2Mo2O9：Tb3+、La2Mo2O9：Sm3+、La2Mo2O9：Er3+、La2Mo2O9：Nd3+、La2Mo2O9：Pr3+納米纖維及多孔納米帶,采用TG-DTA、XRD、FTIR、FESEM、TEM和熒光光譜等技術(shù)對(duì)樣品進(jìn)行了表征。結(jié)果表明,所制備的稀土離子摻雜的La2Mo2O9納米纖維尺寸均一,彼此沒(méi)有交聯(lián),纖維直徑平均為180-220 nm,長(zhǎng)度大于100m。所制備的稀土離子摻雜的La2Mo2O9納米帶為多孔結(jié)構(gòu),寬厚比大,平均帶寬5-7m,厚度約130-280 nm,長(zhǎng)度大于500m。獲得了一些有意義的研究結(jié)果,為進(jìn)一步深入研究稀土離子摻雜的La2Mo2O9發(fā)光納米材料的性質(zhì)奠定了一定的基礎(chǔ)。【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.【關(guān)鍵詞】靜電紡絲 納米纖維 納米帶 La2Mo2O9 發(fā)光材料 稀土離子【英文關(guān)鍵詞】Electrospinning Nanofiber Nanobelt La2Mo2O9 Phosphors materials Rare-earth ion【目錄】靜電紡絲技術(shù)制備稀土離子摻雜La_2Mo_2O_9低維納米材料與表征摘要4-5ABSTRACT5目錄6-10第一章 緒論10-251.1 引言101.2 靜電紡絲技術(shù)10-201.2.1 靜電紡絲技術(shù)的起源111.2.2 靜電紡絲技術(shù)機(jī)理11-131.2.3 靜電紡絲常用裝備13-181.2.4 靜電紡絲的影響因素18-191.2.5 靜電紡絲技術(shù)的應(yīng)用191.2.6 靜電紡絲技術(shù)的發(fā)展前景19-201.3 稀土發(fā)光材料20-221.3.1 稀土發(fā)光材料的分類(lèi)201.3.2 稀土發(fā)光材料的應(yīng)用20-211.3.3 稀土發(fā)光材料的制作方法21-221.3.4 納米稀土發(fā)光材料221.4 稀土La_2Mo_2O_9納米材料22-231.4.1 La_2Mo_2O_9結(jié)構(gòu)特點(diǎn)22-231.5 本課題研究的目的和意義23-25第二章 化學(xué)試劑、實(shí)驗(yàn)儀器及表征方法25-282.1 主要化學(xué)試劑25-262.2 實(shí)驗(yàn)儀器與設(shè)備262.3 表征方法26-282.3.1 生物顯微鏡分析262.3.2 X射線(xiàn)衍射(XRD)分析262.3.3 紅外光譜(FTIR)分析262.3.4 場(chǎng)發(fā)射掃描電子顯微鏡(FE-SEM)分析26-272.3.5 差熱-熱重(TG-DTA)分析272.3.6 熒光光譜分析27-28第三章 La_2Mo_2O_9納米纖維、納米帶的制備與表征28-373.1 引言283.2 實(shí)驗(yàn)28-303.2.1 前驅(qū)體溶液的配制28-293.2.2 PVP/La(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米纖維的制備293.2.3 La_2Mo_2O_9納米纖維的制備293.2.4 PVP/La(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米帶的制備293.2.5 La_2Mo_2O_9納米帶的制備29-303.3 結(jié)果與討論30-363.3.1 XRD分析30-313.3.2 差熱熱重分析(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 本章小結(jié)36-37第四章 La_2Mo_2O_9:Er(3+)納米纖維、納米帶的制備與表征37-454.1 引言374.2 實(shí)驗(yàn)37-394.2.1 前驅(qū)體溶液的配制37-384.2.2 PVP/La(NO_3)_3+Eu(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米纖維的制備384.2.3 La_2Mo_2O_9:Eu(3+)納米纖維的制備384.2.4 PVP/La(NO_3)_3+Eu(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米帶的制備384.2.5 La_2Mo_2O_9:Eu(3+)納米帶的制備38-394.3 結(jié)果與討論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 熒光光譜分析43-444.4 本章小結(jié)44-45第五章 La_2Mo_2O_9:Tb(3+)納米纖維、納米帶的制備與表征45-545.1 引言455.2 實(shí)驗(yàn)45-475.2.1 前驅(qū)體溶液的配制45-465.2.2 PVP/La(NO_3)_3+Tb(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米纖維的制備465.2.3 La_2Mo_2O_9:Tb(3+)納米纖維的制備465.2.4 PVP/La(NO_3)_3+Tb(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米帶的制備465.2.5 La_2Mo_2O_9:Tb(3+)納米帶的制備46-475.3 結(jié)果與討論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 熒光光譜分析51-525.4 本章小結(jié)52-54第六章 La_2Mo_2O_9:Sm(3+)納米纖維、納米帶的制備與表征54-626.1 引言546.2 實(shí)驗(yàn)54-566.2.1 前驅(qū)體溶液的配制54-556.2.2 PVP/La(NO_3)_3+Sm(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米纖維的制備556.2.3 La_2Mo_2O_9:Sm(3+)納米纖維的制備556.2.4 PVP/La(NO_3)_3+Sm(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米帶的制備556.2.5 La_2Mo_2O_9:Sm(3+)納米帶的制備55-566.3 結(jié)果與討論56-606.3.1 XRD分析566.3.2 FESEM分析56-596.3.3 EDS分析59-606.3.4 熒光光譜分析606.4 本章小結(jié)60-62第七章 La_2Mo_2O_9:Er(3+)納米纖維、納米帶的制備與表征62-697.1 引言627.2 實(shí)驗(yàn)62-647.2.1 前驅(qū)體溶液的配制62-637.2.2 PVP/La(NO_3)_3+Er(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米纖維的制備637.2.3 La_2Mo_2O_9:Er(3+)納米纖維的制備637.2.4 PVP/La(NO_3)_3+Er(NO_3)_3+(MH_4)_6Mo_7O_(24)復(fù)合納米帶的制備637.2.5 La_2M_o2O_9:Er(3+)納米帶的制備63-647.3 結(jié)果與討論64-687.3.1 XRD分析64-657.3.2 FESEM分析65-677.3.3 EDS分析67-687.4 本章小結(jié)68-69第八章 La_2Mo_2O_9:Nd(3+)納米纖維、納米帶的制備與表征69-778.1 引言698.2 實(shí)驗(yàn)69-718.2.1 前驅(qū)體溶液的配制69-708.2.2 PVP/La(NO_3)_3+Nd(NO_3)_3+(NH_4)_6Mo_7O_(24)復(fù)合納米纖維的制備708.2.3 La_2Mo_2O_9:Nd(3+)納米纖維的制備708.2.4 PVP/La(NO_3)_3+Nd(NO_3)3+(NH_4)_6Mo_7O_(24)復(fù)合納米帶的制備708.2.5 La_2Mo_2O_9:Nd(3+)納米帶的制備70-718.3 結(jié)果與討論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 熒光光譜分析758.4 本章小結(jié)75-77第九章 La_2Mo_2O_9:Pr(3+)納米纖維、納米帶的制備與表征77-849.1 引言779.2 實(shí)驗(yàn)77-799.2.1 前驅(qū)體溶液的配制77-