| 초록 |
As Indiscriminate usage of fossil fuels in industrial fields has brought out severe environmental issues, demand for eco-friendly technologies has been increased to overcome. Especially, photocatalysis can be one of the key strategies to solve both objectives by utilizing solar energy. Titanium dioxide (TiO2), a promising photo-catalysts, has many advantages such as non-toxicity, high stability and the economical. However, anatase TiO2, which is a representative crystalline phase, has a drawback due to its wide bandgap (3.2 eV). That causes relatively low activity under solar light irradiation. To make up with this, the rutile phase which has a narrower bandgap energy (3.0 eV) can be a candidate. In this study, the rutile phase hollow TiO2 was synthesized by the sol-gel and ion-exchange method. Photodegradation experiments of phenol under visible light irradiation were conducted, and the results indicated the superior activity of the as-prepared catalysts than anatase counterpart. |
