Free-standing Opened-end TiO2 Nanotube-array Films for Microcystin-LR determination by Photoelectrochemical method

• Main Authors: Chen-Chi Wu, 吳振齊
• Other Authors: Chin-Jung Lin
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/11195436715388655695

碩士 === 國立宜蘭大學 === 環境工程學系碩士班 === 104 === Eutrophication of water reservoirs and lakes recently has drawn much attention. Especially, toxin-generating Microcystins aeruginosa significantly affects the water environment, which seriously endanger human health. Water pollution events were continually happening. It has a strong inhibition of protein phosphatase activity induced liver tumor formation, as a common liver toxins. Currently, HPLC was used for detection method of Microcystin toxin in drinking water, It needs the professionals to operate, not only time-consuming, expensive and would produce secondary waste pollution. There are other improved detection techniques, such as animal-tested methods, ELISA, protein phosphatase enzyme. However, it require a high degree of technical, and need expensive equipment, such as HPLC. The fabricated samples were characterized with field-emission-scanning electron microscopy. We get films by changing the experimental conditions, such as moisture content of the electrolyte, anode oxidation time, oxalic acid soaked time, and high-temperature calcination of oxygen content, to control the wall thickness, the nanotube length, or opening degree of the TiO2 nanotube-array film. Its electrode was applied to UV photoelectric devices, by which stability, reproducibility, accuracy, selectivity and detection limit were obtained as compared to TiO2 nanoparticle-film electrode. In environmental sensing, which discusses the trend of gradually growing, there are a few factors to consider development of research, such as product reliability, tolerance, price and energy consumption. In this study, we develop rapid and accurate microcystin photoelectrochemical sensors, real-time monitoring. It can save even more time for the management unit, to ensure the safety and quality of drinking water. We expect that TiO2 nanotube films can be applied in new detection techniques toward a variety of pecifically toxic substances in water environments.