Studies on the application of Electro-polymerization of Micro (Nano) Sized TiO2 Powder on the Air Pollution Control and the Manufacturing of Electrical Layer for Solar Cells

• Main Authors: Yan-Jia Liou, 劉晏嘉
• Other Authors: Wu-Jang Huang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/43210544923403160632

碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 97 === Nano - engineering technology has become the most growing trend in the world since the 20th century. How to apply nanotechnology on the environment in order to remove the decomposition of organic pollutants is the emerging subject. During the past years a preliminary study of Nano-photocatalists confirmed that Nano-TiO2, can polymerize dissolved styrene in water. Due to the direction of the study, it was divided in two major sections: (1) we first use styrene polymerization to explore the effect of temperature and size effect on polymerization and its influence in the characteristics of the product thru analysis of characteristics. (2) As a second part of the experiment, electric layers of dye-sensitized solar cells were be derived as a material to create photovoltaic energy, with a more efficient conversion and low costs of the cells. In the first section of this experiment we used TiO2 polymerization of styrene monomer at different temperatures. From the results of gel permeation chromatography and furrier infrared spectroscopy analysis, we were able to that the average molecular weight of this product was subjected to ambient polymerization temperature effect and then to variation result. Can also be learned that in high and low temperatures, polymerization environment can proceed to react at 3000 cm-1 which is the signal of aromatic functional group, and at 1400 cm-1 which is the signal of alkaline functional enhance; this might be surmised at low and high temperature, to conduct it to environment polymerization of styrene monomer, where the addition of TiO2 can affect its polymerization reaction. Different sizes of TiO2 where exposed in to UV light, after that procedure some of the samples where activated and another part of them was not activated, after this application we proceed to polymerization process of vapor styrene monomer. In different processing times, chromatography analysis was used to measure gas concentration, the result can be known by light activation of Nano-TiO2 polymerization, where the removal of styrene gives as a result the best effect with a removal rate of 97.57%. The obtained product was in a solid-state; nuclear magnetic resonance analysis can be aware from 180 to 400 ppm of chemical shift signals of the polystyrene by carbon signal; however the chemical shift signals from 19 to 160ppm are not from polystyrene. Instead TiO2 polymerization of acetylene structure from the product is more similar. Fourier infrared spectroscopy was used to analyze the infrared spectrum of the product, showing an aromatic functional group signal at 3000 cm-1, as the same showed a methylene functional group signal at 2940 cm-1, an alkaline functional group signal at 1400 cm-1 , and a terminal vinyl functional group signal from 1000 to 500 cm-1 .If this product is compared with literature about Fourier infrared spectrum of polyacetylene, previous conjunction on this polymer can be confirmed. Using differential scanning calorimetric analysis of polymers, as a result we can obtain a product formed at 90 to 100°C , having a Tg, and a product formed at 160°C , having a Tg. From the gel permeation chromatography we can obtain the average of molecular weight, which is greater than 1000 which is a polymer compound, we can obtain too, the structure characteristics of this product, it was found that it posses polystyrene and polyacetylene of copolymers. In the second section of this experiment, synthesization of polymer made of dye-sensitized solar cells was performed, as the same the measure of photovoltaic energy conversion. As a result energy conversion rate of photovoltaic cells immersed in pure TiO2 showed to be low when compared to one half of the solar cells.