Conduction Band Energy Level Control of Titanium Dioxide: Toward an Efficient Visible-Light-Sensitive Photocatalyst

摘要

TiO_2 is well-known as an efficient photocatalyst, but it can only be activated under UV-light irradiation because of its band gap of 3.2 eV (anatase). Therefore, the modification of TiO_2 to make it sensitive to visible light is one of the most important objectives in photocatalyst studies. There have been several studies of the sensitization of TiO_2 with absorbed molecules, such as a Ru complex and H_2[PtCl_6] (or PtCl_4).