应用于电致变色的纳米复合材料制备及性能研究
发布时间：2018-07-28 08:23
【摘要】：复合电致变色材料由于其较大的比表面积、较小的禁带宽度以及直接的电子传输路径等优点成为越来越多研究者们关注的焦点。有机/无机、无机/无机复合都是改善单一材料电致变色性能的重要手段。本文所述实验采用简单的水热法、水化学沉积和光沉积等方法制备了Viologen-ZnO、ZnO@NiO、Viologen-TiO_2、NiO-Ag复合电致变色材料,并对相应材料和电致变色器件做出了一系列的表征和测试。具体内容如下:(1)简单水热法制备ZnO纳米管(棒)阵列,并用甲基紫精有机小分子对其修饰,从而制备Viologen-ZnO纳米棒和纳米管两种复合型电致变色器件。实验研究表明,由于ZnO纳米管阵列比纳米棒阵列具有更大的比表面积,能够吸附更多的有机Viologen小分子,从而使更多的电致变色材料能够加入可逆的氧化还原循环过程,提高了电致变色性能。(2)水热法和水化学沉积法两步制备ZnO@NiO核壳结构复合材料,通过与纯NiO电致变色薄膜相对比,ZnO@NiO展现出了更优异的电致变色性能。由于ZnO@NiO核壳复合材料具有较小的禁带宽度,有利于离子/电子在电致变色层的注入和抽出,从而增强了电致变色的光学调制范围、响应速度和着色效率等性能。(3)在FTO玻璃表面制备出不同厚度的TiO_2纳米棒阵列薄膜,通过用有机小分子Viologen对其修饰,从而形成Viologen-TiO_2纳米棒电致变色器件工作电极。本部分主要研究了TiO_2纳米棒阵列薄膜的厚度以及电压对电致变色器件的影响。(4)水化学沉积和光沉积法两步制备NiO-Ag复合电致变色材料,Ag纳米颗粒的复合提高了NiO-Ag电致变色器件的响应速度等电致变色性能。Ag纳米颗粒良好的电导性促进了电子在工作电极的传输,从而提高了电致变色器件的响应速度。除此之外,我们对柔性全固态NiO-Ag电致变色器件也进行了一定的研究。
[Abstract]:Because of its large specific surface area, small band gap and direct electron transmission path, composite electrochromic materials have become the focus of more and more researchers. Organic / inorganic and inorganic / inorganic composites are important means to improve the electrochromic properties of single materials. In this paper, simple hydrothermal method, hydrochemical deposition and photodeposition were used to fabricate the composite electrochromic materials of Viologen-ZnOOPO-ZnOPO-ZnOPO-NiONiONiO-Ag. The corresponding materials and electrochromic devices were characterized and tested. The main contents are as follows: (1) ZnO nanotube (rod) arrays were prepared by simple hydrothermal method and modified with methylviolet organic small molecules to prepare Viologen-ZnO nanorods and nanotube composite electrochromic devices. The experimental results show that ZnO nanotube arrays have larger specific surface area than nanorods arrays, and can absorb more organic Viologen molecules, so that more electrochromic materials can be added to the reversible redox cycle process. The electrochromic properties were improved. (2) ZnO@NiO core-shell structure composites were prepared by hydrothermal method and hydrochemical deposition method. Compared with pure NiO electrochromic films, the electrochromic properties of ZnO@NiO core-shell composites were better than that of pure NiO films. Because the ZnO@NiO core-shell composite has a small band gap, it is advantageous to the implantation and extraction of ions / electrons in the electrochromic layer, thus enhancing the optical modulation range of electrochromic. Response rate and coloring efficiency. (3) TiO_2 nanorod array films with different thickness were prepared on the surface of FTO glass and modified with small organic Viologen to form the working electrode of Viologen-TiO_2 nanorod electrochromic device. In this part, the effect of thickness and voltage of TiO_2 nanorod array film on electrochromic devices was studied. (4) the composite of NiO-Ag composite electrochromic material, Ag nanoparticles, was prepared by hydrochemical deposition and photodeposition. The response speed of the photochromic device is equal to the electrochromic properties. The good conductivity of Ag nanoparticles promotes the transmission of electrons at the working electrode. Thus, the response speed of electrochromic devices is improved. In addition, we also study the flexible all-solid-state NiO-Ag electrochromic devices.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB33;TN383.1
本文编号：2149493
[Abstract]:Because of its large specific surface area, small band gap and direct electron transmission path, composite electrochromic materials have become the focus of more and more researchers. Organic / inorganic and inorganic / inorganic composites are important means to improve the electrochromic properties of single materials. In this paper, simple hydrothermal method, hydrochemical deposition and photodeposition were used to fabricate the composite electrochromic materials of Viologen-ZnOOPO-ZnOPO-ZnOPO-NiONiONiO-Ag. The corresponding materials and electrochromic devices were characterized and tested. The main contents are as follows: (1) ZnO nanotube (rod) arrays were prepared by simple hydrothermal method and modified with methylviolet organic small molecules to prepare Viologen-ZnO nanorods and nanotube composite electrochromic devices. The experimental results show that ZnO nanotube arrays have larger specific surface area than nanorods arrays, and can absorb more organic Viologen molecules, so that more electrochromic materials can be added to the reversible redox cycle process. The electrochromic properties were improved. (2) ZnO@NiO core-shell structure composites were prepared by hydrothermal method and hydrochemical deposition method. Compared with pure NiO electrochromic films, the electrochromic properties of ZnO@NiO core-shell composites were better than that of pure NiO films. Because the ZnO@NiO core-shell composite has a small band gap, it is advantageous to the implantation and extraction of ions / electrons in the electrochromic layer, thus enhancing the optical modulation range of electrochromic. Response rate and coloring efficiency. (3) TiO_2 nanorod array films with different thickness were prepared on the surface of FTO glass and modified with small organic Viologen to form the working electrode of Viologen-TiO_2 nanorod electrochromic device. In this part, the effect of thickness and voltage of TiO_2 nanorod array film on electrochromic devices was studied. (4) the composite of NiO-Ag composite electrochromic material, Ag nanoparticles, was prepared by hydrochemical deposition and photodeposition. The response speed of the photochromic device is equal to the electrochromic properties. The good conductivity of Ag nanoparticles promotes the transmission of electrons at the working electrode. Thus, the response speed of electrochromic devices is improved. In addition, we also study the flexible all-solid-state NiO-Ag electrochromic devices.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB33;TN383.1
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