石墨烯基復(fù)合材料的制備、表征及應(yīng)用
[Abstract]:Graphene, a new type of two-dimensional carbon nanomaterials with monoatomic thickness, has many special advantages, such as ultra-high specific surface area, fast electron transport capacity, excellent mechanical and mechanical properties, and remarkable thermal conductivity. And extraordinary elastic properties that make graphene a potential material and can be used in various industries. However, pure graphene materials are easy to form stacking and agglomeration in the process of preparation, so the introduction of graphene matrix composites not only maximizes the use of graphene properties, but also has its own advantages of doped compounds. Graphene-based composites can be used effectively in various industries, such as lithium-ion batteries, supercapacitors, solar cells, transparent electrodes, electronic transistors, biosensor detection, gas storage, and so on. Very rich performance results have been obtained. Based on the characteristics of high specific surface area and fast electron transport ability of graphene materials, the composites were prepared by combining foreign metal oxide particles, external conductive polymers, and so on. As a result of industrial water purification and supercapacitors and other applications, further improve the performance of the equipment. The main research contents can be divided into the following two aspects. Firstly, according to the preparation methods of magnetic-graphene oxide composites reported in the literature, the carboxyl groups on the edge of graphene and the amino groups on the surface of iron oxide were synthesized by ultrasonic assisted synthesis of simple reagents such as EDC and NHS. The Fe _ 2O _ 3-graphene composite was prepared by the formation of super-stable amide bond. The composite can remove dye pollutants from water very efficiently, and it can decompose the dye pollutants that have been adsorbed in the composites by illumination, thus the innovation of recycling can be achieved. The composites were further characterized by means of high power transmission microscope, X-ray analysis, thermogravimetric analysis, hysteresis loop and so on. Second, the in-situ reduction of graphene with polythiophene-pyrene nanoband was carried out through the in-situ reduction of graphene with ultra-high specific surface area and ultra-strong electron transport capacity. Graphene / polythiophene pyrene nanoband composites were used in electrode materials of supercapacitors. The biggest innovation of the composite is that the morphology of graphene layer is influenced by macroscopical control of polythiophene pyrene participation. The larger the proportion of polythiophene pyrene, the more the morphology of graphene is regulated and changed, and the larger the proportion of polythiophene pyrene is, the more the morphology of graphene is regulated and changed. At the same time, the more stable the capacitance value of the composite is, the slower the decrease is. Both the characteristics of graphene and the high specific capacitance of polythiophene pyrene were used to prepare innovative structures and make full use of the properties of each participating compound. It is a potential electrode material for supercapacitor.
【學(xué)位授予單位】:南京郵電大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類(lèi)號(hào)】:TQ127.11;TB33
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