三唑亞鐵納米復(fù)合材料的制備及性能研究
發(fā)布時間：2018-09-01 07:17
【摘要】：自旋轉(zhuǎn)換配合物作為分子磁性材料的前沿領(lǐng)域,由于其可控的雙穩(wěn)態(tài)性質(zhì)在傳感器、顯示材料、信息存儲及分子開關(guān)等方面有潛在的應(yīng)用,從而受到了科學(xué)家們的廣泛關(guān)注。三唑亞鐵配合物是具有自旋轉(zhuǎn)換特性的磁性材料,雖然能夠在納米級別保持良好的磁性協(xié)同性,但三唑亞鐵納米材料的易脆性和難加工性限制了其在實際功能性器件中的應(yīng)用,而具有多功能的自旋轉(zhuǎn)換納米材料也成為科技發(fā)展的需求。因此,設(shè)計、合成不同的新型自旋轉(zhuǎn)換納米復(fù)合材料具有很重要的理論和現(xiàn)實意義。本課題旨在從基底復(fù)合、金納米修飾和多步階梯自旋轉(zhuǎn)換行為三個方面設(shè)計、合成不同的三唑亞鐵納米復(fù)合材料,研究復(fù)合材料間的相互影響,尤其是三唑亞鐵納米材料自旋轉(zhuǎn)換性能的變化情況:1.為了研究不同基底對三唑亞鐵納米材料的形貌和自旋轉(zhuǎn)換性能的影響,我們分別以石墨烯、氧化鋁膜(AAO)、陽離子交換樹脂為基底,通過不同方法與三唑亞鐵化合物復(fù)合成功得到了相應(yīng)的自旋轉(zhuǎn)換納米復(fù)合材料:i)利用微乳液方法合成的[Fe(Htrz)2(trz)](BF4)納米顆粒與石墨烯在乙醇溶液中以不同的質(zhì)量比反應(yīng),獲得了以石墨烯為基底的SCO-G納米復(fù)合材料,電鏡顯示[Fe(Htrz)2(trz)](BF4)納米顆粒(ca.50 nm)較均勻地分布在石墨烯表面,磁性結(jié)果表明納米復(fù)合材料中[Fe(Htrz)2(trz)](BF4)納米顆粒的自旋轉(zhuǎn)換溫度向高溫區(qū)移動;ii)通過在不同的前驅(qū)體反應(yīng)溶液中浸泡AAO膜,研究了[Fe(Htrz)2(trz)](Cl O4)和[Fe(NH2-trz)2(NH-trz)](Cl O4)納米材料在AAO膜表面及孔道的生長情況,結(jié)果表明AAO膜的空間限制作用極大的影響了三唑亞鐵納米材料的形貌,并在磁性測試中得到了非常有意義的兩步階梯自旋轉(zhuǎn)換現(xiàn)象;iii)同樣采用在前驅(qū)體反應(yīng)溶液中浸泡樹脂球的方法,成功制備了以樹脂球為基底的[Fe(Htrz)2(trz)](BF4)納米棒陣列復(fù)合材料,SEM直觀地表現(xiàn)了[Fe(Htrz)2(trz)](BF4)納米棒在樹脂表面不同時間段的生長情況,磁性測試證明自旋轉(zhuǎn)換行為完好的保存在此特殊形貌的球狀納米棒陣列中。2.為了研究金納米顆粒的光致熱效應(yīng)對三唑亞鐵納米材料光致自旋轉(zhuǎn)換性能的影響,我們對兩種不同尺寸的[Fe(Htrz)2(trz)](BF4)@Si O2納米顆粒進行表面氨基功能化修飾,在其表面成功包覆了小粒徑金納米顆粒,由此得到了兼具有自旋轉(zhuǎn)換性能和光致熱效應(yīng)的雙功能納米復(fù)合材料。拉曼光譜證明金納米的光致熱效應(yīng)使得[Fe(Htrz)2(trz)](BF4)@Si O2@Au納米顆粒在光致自旋轉(zhuǎn)換過程中的能量需求降低了~100倍,同時由于金納米良好的導(dǎo)熱性,[Fe(Htrz)2(trz)](BF4)@Si O2@Au納米顆粒在熱致自旋轉(zhuǎn)換過程中的的轉(zhuǎn)變溫度向高溫移動,而熱滯回線寬度有所減小。3.基于自旋轉(zhuǎn)換納米復(fù)合材料體系中由不同有機配體引起的多步階梯自旋轉(zhuǎn)換行為的研究空白,我們利用簡便的連續(xù)微乳液法合成了具有核殼結(jié)構(gòu)的[Fe(Htrz)2(trz)](BF4)@[Fe(NH2-trz)2(NH-trz)](BF4)納米復(fù)合材料,利用SEM監(jiān)控了它和[Fe(Htrz)2(trz)](BF4)、[Fe(NH2-trz)2(NH-trz)](BF4)在微乳液中不同時間段的生長情況,在磁性測試中也得到了預(yù)期的階梯自旋轉(zhuǎn)換行為。
[Abstract]:As the frontier of molecular magnetic materials, spin-exchange complexes have attracted much attention due to their controllable bistability, potential applications in sensors, display materials, information storage and molecular switches. Nano-scale magnetic synergy is maintained, but the brittleness and machinability of ferrous triazole nano-materials limit their applications in functional devices, and multi-functional self-rotating nano-materials have become the demand of the development of science and technology. The purpose of this project is to design and synthesize different triazole ferrous nanocomposites from three aspects: substrate composite, gold nano-modification and multi-step spin-exchange behavior, and to study the interaction between the composite materials, especially the change of the spin-exchange properties of triazole ferrous nanomaterials: 1. The influence of the substrate on the morphology and spin conversion properties of three azole iron nanomaterials, we have obtained the corresponding spin conversion nanocomposites by graphene, alumina membrane (AAO) and cation exchange resin based on different methods with three azole iron compounds: I) [Fe (Htrz) 2 (Trz) synthesized by microemulsion (BF4). SCO-G nanocomposites based on graphene were prepared by the reaction of graphene with nanoparticles in ethanol solution at different mass ratios. Electron microscopy showed that [Fe (Htrz) 2 (trz)] (BF4) nanoparticles (ca.50 nm) were uniformly distributed on the surface of graphene. Magnetic results showed that [Fe (Htrz) 2 (trz)] (BF4) nanoparticles were self-contained in the nanocomposites. (ii) The growth of [Fe (Htrz) 2 (trz)] (ClO 4) and [Fe (NH2-trz) 2 (NH-trz)] (ClO 4) nanomaterials on the surface of AAO films and the growth of pore channels were studied by immersing AAO films in different precursor reaction solutions. The results showed that the spatial confinement of AAO films greatly affected the morphology of triazole ferrous nanomaterials. Significant two-step spin-exchange phenomena were obtained in magnetic measurements; iii) The composite of [Fe (Htrz) 2 (trz)] (BF4) nanorod arrays was successfully prepared by immersing the resin balls in the precursor reaction solution, and the [Fe (Htrz) 2 (trz)] (BF4) nanorods were visually displayed on the resin surface by SEM. In order to study the effect of photothermal effect of gold nanoparticles on the photoinduced spin-exchange properties of ferrous triazole nanomaterials, we investigated the effects of two different sizes of [Fe (Htrz) 2 (trz)] (BF4) @Si O2 nanoparticles on the photoinduced spin-exchange properties of these nanorod arrays. The nanoparticles were successfully coated with small size gold nanoparticles by amino functional modification on the surface of the nanoparticles. The bifunctional nanocomposites with both spin-exchange properties and photothermal effects were obtained. Raman spectroscopy showed that the photothermal effect of the gold nanoparticles led to the photoinduced spin of [Fe(Htrz)2(trz)](BF4)@Si O2@Au nanoparticles. The energy requirement during the conversion process is reduced by ~100 times, and the transition temperature of [Fe(Htrz)2(trz)](BF4)@Si O2@Au nanoparticles in the thermo-induced spin-transfer process shifts to high temperature due to the good thermal conductivity of the gold nanoparticles, while the thermal hysteresis loop width decreases. In the research gap of multi-step spin conversion behavior, we have used a simple continuous microemulsion method to synthesize [Fe (Htrz) 2 (Trz)] (BF4) @[Fe (NH2-trz) 2 (NH-trz)] (BF4) nanocomposite with core-shell structure, and monitored it and [Fe (Htrz) 2 (SEM)) by using SEM, and the growth of ((2)) (NH2-trz) in the microemulsion at different time intervals. In the magnetic test, the expected step spin conversion behavior is also obtained.
【學(xué)位授予單位】：江南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB383.1;TB33
本文編號：2216495
[Abstract]:As the frontier of molecular magnetic materials, spin-exchange complexes have attracted much attention due to their controllable bistability, potential applications in sensors, display materials, information storage and molecular switches. Nano-scale magnetic synergy is maintained, but the brittleness and machinability of ferrous triazole nano-materials limit their applications in functional devices, and multi-functional self-rotating nano-materials have become the demand of the development of science and technology. The purpose of this project is to design and synthesize different triazole ferrous nanocomposites from three aspects: substrate composite, gold nano-modification and multi-step spin-exchange behavior, and to study the interaction between the composite materials, especially the change of the spin-exchange properties of triazole ferrous nanomaterials: 1. The influence of the substrate on the morphology and spin conversion properties of three azole iron nanomaterials, we have obtained the corresponding spin conversion nanocomposites by graphene, alumina membrane (AAO) and cation exchange resin based on different methods with three azole iron compounds: I) [Fe (Htrz) 2 (Trz) synthesized by microemulsion (BF4). SCO-G nanocomposites based on graphene were prepared by the reaction of graphene with nanoparticles in ethanol solution at different mass ratios. Electron microscopy showed that [Fe (Htrz) 2 (trz)] (BF4) nanoparticles (ca.50 nm) were uniformly distributed on the surface of graphene. Magnetic results showed that [Fe (Htrz) 2 (trz)] (BF4) nanoparticles were self-contained in the nanocomposites. (ii) The growth of [Fe (Htrz) 2 (trz)] (ClO 4) and [Fe (NH2-trz) 2 (NH-trz)] (ClO 4) nanomaterials on the surface of AAO films and the growth of pore channels were studied by immersing AAO films in different precursor reaction solutions. The results showed that the spatial confinement of AAO films greatly affected the morphology of triazole ferrous nanomaterials. Significant two-step spin-exchange phenomena were obtained in magnetic measurements; iii) The composite of [Fe (Htrz) 2 (trz)] (BF4) nanorod arrays was successfully prepared by immersing the resin balls in the precursor reaction solution, and the [Fe (Htrz) 2 (trz)] (BF4) nanorods were visually displayed on the resin surface by SEM. In order to study the effect of photothermal effect of gold nanoparticles on the photoinduced spin-exchange properties of ferrous triazole nanomaterials, we investigated the effects of two different sizes of [Fe (Htrz) 2 (trz)] (BF4) @Si O2 nanoparticles on the photoinduced spin-exchange properties of these nanorod arrays. The nanoparticles were successfully coated with small size gold nanoparticles by amino functional modification on the surface of the nanoparticles. The bifunctional nanocomposites with both spin-exchange properties and photothermal effects were obtained. Raman spectroscopy showed that the photothermal effect of the gold nanoparticles led to the photoinduced spin of [Fe(Htrz)2(trz)](BF4)@Si O2@Au nanoparticles. The energy requirement during the conversion process is reduced by ~100 times, and the transition temperature of [Fe(Htrz)2(trz)](BF4)@Si O2@Au nanoparticles in the thermo-induced spin-transfer process shifts to high temperature due to the good thermal conductivity of the gold nanoparticles, while the thermal hysteresis loop width decreases. In the research gap of multi-step spin conversion behavior, we have used a simple continuous microemulsion method to synthesize [Fe (Htrz) 2 (Trz)] (BF4) @[Fe (NH2-trz) 2 (NH-trz)] (BF4) nanocomposite with core-shell structure, and monitored it and [Fe (Htrz) 2 (SEM)) by using SEM, and the growth of ((2)) (NH2-trz) in the microemulsion at different time intervals. In the magnetic test, the expected step spin conversion behavior is also obtained.
【學(xué)位授予單位】：江南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB383.1;TB33
【參考文獻】
相關(guān)期刊論文 前10條
1 潘錚錚,王榮,周震,閻杰;球型氫氧化鎳表面包覆CoOOH的研究[J];電源技術(shù);2001年03期
2 趙福真;季生福;李振峰;李成岳;;Cu_xCe_(1-x)O(2-x)/SiO_2催化劑上CO催化氧化及反應(yīng)活化能[J];分子催化;2009年03期
3 鄧梅根,張治安,胡永達,汪斌華,楊邦朝;超級電容器碳納米管與二氧化錳復(fù)合電極材料的研究[J];硅酸鹽學(xué)報;2004年04期
4 孔繼川;繆娟;;薄膜太陽能電池研究進展[J];化工時刊;2008年07期
5 母繼榮;環(huán)氧樹脂在半導(dǎo)體器件中的應(yīng)用及發(fā)展[J];化工進展;2001年05期
6 王虹;唐致遠;李中延;柳勇;謝輝;;V_2O_5/石墨復(fù)合材料的電容性能[J];化工進展;2008年07期
7 彭先佳;賈建軍;欒兆坤;王軍;;碳納米管在水處理材料領(lǐng)域的應(yīng)用[J];化學(xué)進展;2009年09期
8 鞏雄,張桂蘭,湯國慶,陳文駒,劉豐;稀土離子對DBS表面包覆的Fe_2O_3納米微粒非線性光學(xué)特性的影響[J];科學(xué)通報;1997年13期
9 李云霞;魏子棟;趙巧玲;丁煒;張騫;陳四國;;石墨烯負載Pt催化劑的制備及催化氧還原性能[J];物理化學(xué)學(xué)報;2011年04期
10 黃傳勇,孫淑珍,張中太;生物陶瓷復(fù)合材料的研究[J];中國生物醫(yī)學(xué)工程學(xué)報;2000年03期
相關(guān)會議論文 前1條
1 文慶珍;朱金華;李金玉;;聚氨酯／納米粒子復(fù)合材料的吸聲性能的研究[A];2006年全國高分子材料科學(xué)與工程研討會論文集[C];2006年
，本文編號：2216495
本文鏈接：http://sikaile.net/kejilunwen/cailiaohuaxuelunwen/2216495.html
最近更新
教材專著
