一维银纳米结构的化学合成及性能研究
发布时间：2018-07-25 20:41
【摘要】：随着纳米科技的发展,一维纳米结构材料受到了人们的广泛关注尤其是一维银纳米结构材料由于其有着独特的化学和物理性质：表面增强拉曼效应、局部等离子体共振效应、荧光增强性等,从而在科学技术方面有很大的重要性。银纳米结构的这些性质与其形貌、尺寸密切相关。因此,如何控制银纳米材料的形貌和尺寸成为人们研究的重点,但目前的合成方法一般比较复杂,本文主要以简单有效的一步法合成一系列一维银纳米结构材料。本文的主要内容包括以下三个方面：1.光诱导法制备银纳米线和纳米棒在本文中我们使用自然光制备出银纳米线和纳米棒,并利用X-粉末衍射(XRD),场发射电子扫描显微镜(FESEM)和紫外-可见吸收光谱(UV-vis)测试仪等手段对样品的物相和形貌进行了表征。在这种方法下,我们制备出直径大约在100-200nm、长度达到50μm以上和产率高达90%的银纳米线,和直径大约在300-500nm、长度在5-10μm和同样高产率的银纳米棒；并且研究了各种因素(光照时间、PVP和温度等)对银纳米线形成的影响。2.大量简易控制合成Ag/SiO2核壳结构纳米线由于一维银核壳纳米线在催化、电子、光学和信息储存方面有着重要的应用,因而受到人们广泛的关注。我们通过一种简易的溶剂法来合成了Ag/SiO2核壳结构纳米线。使用X-粉末衍射(XRD),场发射电子扫描显微(FESEM)和紫外-可见吸收光谱(UV-vis)测试仪等手段对样品的物相和形貌进行了表征。这种Ag/SiO2纳米线的直径大约在200-300nm、长度在几十个微米和几个纳米厚的壳,并且详细地研究了这种核壳结构纳米线的反应机理和形貌的变化过程。这种简易的方法是可以扩展到生产新混合材料潜在的应用上的。3.Ag/TiO2(B)层状核壳结构纳米线的合成与性质：简易合成、光催化及抗菌性能由于核壳结构的物理和化学性质,从而在科学技术方面有着重要的作用。在本研究中,我们第一次用简易地方法合成了直径在200nm,长度在10μm左右的Ag@TiO2(B)层状核壳结构纳米线。通过协同软硬模板法在硝酸银、TBT和乙二醇的共同作用下合成了Ag@TiO2(B)层状核壳结构纳米线。每根Ag@TiO2(B)层状核壳结构纳米线都是由50-70nm的银纳米线和超薄的单斜p-TiO2(B)片组成,并且成功地将几个纳米薄片的(010)面暴露。通过实验发现,温度和TBT对层状核壳结构的形成起着至关重要的作用,正如所料,其层状核壳结构纳米线对RhB有着很好的降解作用。特别的,Ag@TiO2(B)层状核壳结构纳米线展现出优越、持久的杀菌和抑菌性能。
[Abstract]:With the development of nanotechnology, one-dimensional nanostructured materials have attracted extensive attention, especially because of their unique chemical and physical properties: surface-enhanced Raman effect, local plasmon resonance effect. Fluorescence enhancement and so on, thus has the great importance in the science and technology aspect. These properties of silver nanostructures are closely related to their morphology and size. Therefore, how to control the morphology and size of silver nanomaterials has become the focus of research, but the current synthesis methods are generally more complex. In this paper, a series of one-dimensional silver nanostructured materials are synthesized by a simple and effective one-step method. The main contents of this paper include the following three aspects: 1. Silver nanowires and nanorods were prepared by light-induced method. In this paper, we use natural light to prepare silver nanowires and nanorods. The phase and morphology of the samples were characterized by X-ray powder diffraction (XRD),) field emission electron scanning microscope (FESEM) and UV-Vis absorption spectroscopy (UV-vis). In this method, silver nanowires with diameter of about 100-200 nm, length of more than 50 渭 m and yield of 90% were prepared, and silver nanorods with diameter of about 300-500 nm, length of 5-10 渭 m and the same high yield were prepared. The effects of various factors (light time, PVP, temperature, etc.) on the formation of silver nanowires were also studied. A large number of simple controlled synthesis of Ag/SiO2 core-shell nanowires have attracted wide attention due to their important applications in catalysis, electron, optics and information storage. We synthesized Ag/SiO2 core-shell nanowires by a simple solvent method. The phase and morphology of the samples were characterized by X-ray powder diffraction (XRD),) field emission electron scanning microscopy (FESEM) and UV-Vis absorption spectroscopy (UV-vis). The diameter of the Ag/SiO2 nanowires is about 200-300 nm, the length of the nanowires is in the range of dozens of microns and several nanometers thick, and the reaction mechanism and morphology of the core-shell nanowires are studied in detail. This simple method can be extended to potential applications in the production of new mixtures. 3. Synthesis and properties of layered core-shell nanowires of Ag- / TiO2 (B): simple synthesis, photocatalytic and antibacterial properties due to the physical and chemical properties of core-shell structures, Thus it plays an important role in science and technology. In this study, we synthesized for the first time Ag@TiO2 (B) layered core-shell nanowires with a diameter of 200 nm and length of about 10 渭 m. Ag@TiO2 (B) nanowires with layered core-shell structure were synthesized by means of soft and hard template method under the combined action of silver nitrite and ethylene glycol. Each of the Ag@TiO2 (B) layered core-shell nanowires is composed of 50-70nm silver nanowires and ultra-thin monoclinic p-TiO2 (B) sheets. It is found that temperature and TBT play an important role in the formation of layered core-shell structure. As expected, the layered core-shell structure nanowires can degrade RhB well. The special Ag@ TiO2 (B) layered core-shell nanowires exhibit excellent bactericidal and bacteriostatic properties.
【学位授予单位】：浙江师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O614.122;TB383.1
[Abstract]:With the development of nanotechnology, one-dimensional nanostructured materials have attracted extensive attention, especially because of their unique chemical and physical properties: surface-enhanced Raman effect, local plasmon resonance effect. Fluorescence enhancement and so on, thus has the great importance in the science and technology aspect. These properties of silver nanostructures are closely related to their morphology and size. Therefore, how to control the morphology and size of silver nanomaterials has become the focus of research, but the current synthesis methods are generally more complex. In this paper, a series of one-dimensional silver nanostructured materials are synthesized by a simple and effective one-step method. The main contents of this paper include the following three aspects: 1. Silver nanowires and nanorods were prepared by light-induced method. In this paper, we use natural light to prepare silver nanowires and nanorods. The phase and morphology of the samples were characterized by X-ray powder diffraction (XRD),) field emission electron scanning microscope (FESEM) and UV-Vis absorption spectroscopy (UV-vis). In this method, silver nanowires with diameter of about 100-200 nm, length of more than 50 渭 m and yield of 90% were prepared, and silver nanorods with diameter of about 300-500 nm, length of 5-10 渭 m and the same high yield were prepared. The effects of various factors (light time, PVP, temperature, etc.) on the formation of silver nanowires were also studied. A large number of simple controlled synthesis of Ag/SiO2 core-shell nanowires have attracted wide attention due to their important applications in catalysis, electron, optics and information storage. We synthesized Ag/SiO2 core-shell nanowires by a simple solvent method. The phase and morphology of the samples were characterized by X-ray powder diffraction (XRD),) field emission electron scanning microscopy (FESEM) and UV-Vis absorption spectroscopy (UV-vis). The diameter of the Ag/SiO2 nanowires is about 200-300 nm, the length of the nanowires is in the range of dozens of microns and several nanometers thick, and the reaction mechanism and morphology of the core-shell nanowires are studied in detail. This simple method can be extended to potential applications in the production of new mixtures. 3. Synthesis and properties of layered core-shell nanowires of Ag- / TiO2 (B): simple synthesis, photocatalytic and antibacterial properties due to the physical and chemical properties of core-shell structures, Thus it plays an important role in science and technology. In this study, we synthesized for the first time Ag@TiO2 (B) layered core-shell nanowires with a diameter of 200 nm and length of about 10 渭 m. Ag@TiO2 (B) nanowires with layered core-shell structure were synthesized by means of soft and hard template method under the combined action of silver nitrite and ethylene glycol. Each of the Ag@TiO2 (B) layered core-shell nanowires is composed of 50-70nm silver nanowires and ultra-thin monoclinic p-TiO2 (B) sheets. It is found that temperature and TBT play an important role in the formation of layered core-shell structure. As expected, the layered core-shell structure nanowires can degrade RhB well. The special Ag@ TiO2 (B) layered core-shell nanowires exhibit excellent bactericidal and bacteriostatic properties.
【学位授予单位】：浙江师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O614.122;TB383.1
【相似文献】
相关期刊论文 前10条
1 周吉峰;银纳米团可以储存更多的光学数据[J];稀有金属快报;2001年12期
2 邹凯,张晓宏,吴世康,段晓峰;光化学法合成银纳米线及其形成机理的研究[J];化学学报;2004年18期
3 ;硅酸盐基银纳米孔复合材料顺利通过检测[J];有机硅氟资讯;2005年08期
4 周学东;何鑫;赵修建;赵小锋;;一维银纳米棒的制备及其薄膜化研究[J];材料导报;2006年S2期
5 王悦辉;张琦;周济;;银纳米立方体的制备及其影响因素[J];材料导报;2008年03期
6 冯晋阳;刘保顺;宋明霞;周学东;赵修建;;玻璃中定向银纳米棒的制备及偏光性能研究[J];武汉理工大学学报;2009年04期
7 马占芳;司国丽;初一鸣;陈颖;;三角银纳米柱的研究进展[J];化学进展;2009年09期
8 吴馨洲;裴梅山;王庐岩;李肖男;陶绪堂;;线状和树枝状银纳米结构、形成机理及表面增强拉曼散射性质(英文)[J];物理化学学报;2010年11期
9 李山;钟明亮;张礼杰;熊祖洪;张中月;;偏振方向及结构间耦合作用对空心方形银纳米结构表面等离子体共振的影响[J];物理学报;2011年08期
10 赵红;付宏刚;田春贵;任志宇;袁明明;;银纳米枝的合成及表面增强拉曼效应[J];高等学校化学学报;2011年10期
相关会议论文 前10条
1 邵桂雪;李天保;张华;赵君芙;梁建;许并社;;微波冷凝回流制备银纳米线[A];2011中国材料研讨会论文摘要集[C];2011年
2 李慧s，
本文编号：2145021
本文链接：https://www.wllwen.com/kejilunwen/cailiaohuaxuelunwen/2145021.html
