Cu doped TiO2 for the degradation of Methylene blue and PCBs.

• Main Authors: Luo, Wen-Han, 羅威翰
• Other Authors: Lin, Yaw-Jian
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/pvtuw9

碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 105 === In recent years, photocatalytic oxidation process is a potential technology. The widely use of photocatalyst titanium dioxide is due to its lowest cost and effectiveness. Methylene blue is a commonly used dye because it can adsorb many substances and is often used as the subject of contaminant for photodegradation experiments. Polychlorinated biphenyls with high stability, not easily biodegradable, and the emissions to the environment will endanger human health and damage the environment. In this study, copper metal doped to TiO2 photocatalysts were prepared, and the photocatalytic efficiency was compared under different experimental conditions. The photocatalytic efficiency of methylene blue and PCBs aqueous solution were further investigated. In the SEM observation, the samples did not change the crystal types due to the temperature. EDX analysis showed that the content of Cu was detected. It was confirmed that Cu was incorporated into the sample. In the XRD analysis, the samples were mostly anatase phase, and the samples were changed to rutile at 600 ℃. Analysis of catalyst phase was conducted by X - ray diffraction analysis. Energy dissipation spectrometer was used for catalyst elemental percentage analysis. From the photolysis test, the overall average of the test was natural daylight > visible light > xenon lamp, where the best photocatalytic effect was obtained using 0.1M Cu/TiO2 at 500℃. The results of the above experiment showed that the sample of 0.1M/500℃ was repeated three times in the experiment without obvious decrease of efficiency. At the condition of 0.1M/500℃, the solution of polychlorinated biphenyl under visible light was removed at the maximum removal rate of 52.6 %, the toxicity inhibition rate was 44.48%.