Photocatalytic degradation of reactive dye, Red 120, has been carried out on TiO₂ particles as photocatalyst under UV irradiation. In this experiment, comparison on the removal of reactive dye by photolysis photocatalyst adsorption and photocatalysis as well as the effect of experimental parameters such as the number of column employed, circulation flow rate, intensity of the light, pH and TiO₂ dosage affecting the reaction efficiency of photocatalytic degradation of reactive dye in circular type reactor was examined. The results of this study were as follows. 1. With both UV light illumination and TiO₂ present, reactive dye was more effectively eliminated than with either UV or TiO₂ alone. It was found that application of TiO₂ photocatalysis to reactive dye was possible. 2. As the number of column employed increased, the removal efficiency of reactive dye was increased. 3. A s the circulation flow rate of solution increased, the removal efficiency of reactive dye was increased. However, over 1 !/min of the circulation flow rate, the efficiency was limited. 4 . Photocatalytic degradation of reactive dye increased linearly with increasing UV light intensity. However, over 15 mW/㎠ of UV light intensity, the efficiency reached a plateau. 5. The photocatalytic degradation rate was greater in acid media of pH 5.2 than in neutral and alkaline media. 5. Photocatalytic removal efficiency of reactive dye increased with increasing TiO₂ dosage. However, over 1.0 g/L of TiO₂ dosage, the efficiency reached a plateau.
I. 서론
II. 반응성 염료의 광촉매반응 메카니즘
III. 실험장치 및 방법
IV. 결과 및 고찰
V. 결론