| 초록 |
When photocatalysts get light energy and act as a catalyst, affecting reaction rates in chemical reactions. As light is emitted, it behaves like electrons (e-) and holes (electrons with positive charges) on the surface, and electrons react with oxygen and water around the photocatalyst, resulting in hydroxyl radical (neutral OH). In this study, the creation of hybrid TiO2-photochromic dye coating material is considered in the substrate by photochromic dyes. In order to identify the most efficient NO reduction properties, model is developed according to ISO 22197 test method and evaluated efficiency of photocatalyst by colorimetric analysis. This evaluation work contributes to the development of TiO2-photochromic dye coating with color sensor and provides high performance in detecting and controlling NO that causes particulate / ultrafine particle contaminants in air. |
