| 초록 |
The photoinduced electron transfers occurring at the semiconductor surface are the key process of solar photosynthetic and photocatalytic processes. Metal oxides such as TiO2, WO3, and Fe2O3 are the most practical base materials for such applications. The heterojunctions built at the interface of them enhance the interfacial charge transfer to achieve the higher conversion efficiency. In this talk, various modifications of metal oxides with interfacial heterojunctions will be discussed for photoelectrochemical and photosynthetic applications. The specific examples include dual-purpose photocatalysis for H2-recovering water treatment, thin alumina layer-coated WO3 for water oxidation, thin TaOxNy layer coated N-TiO2 nanotubes for water splitting, TiO2/graphene composites, hydrogenated Sn-doped hematite for photoelectrochemical water splitting, and charge transfer complexation on the surface of TiO2. Each modification method has a different effect on the solar conversion activity and the mechanisms, which will be discussed in detail. |
