| 초록 |
Hydrogen as a green energy carrier has attracted much attention, due to its high energy capacity, environment-friendly characteristics, and sustainability. Titanium dioxide (TiO2) material is a fabulous photocatalyst due to its advantages such as relatively high catalytic activity, excellent stability and cheap production price. In this study, we report the monodispersed spherical TiO2 particles with disordered rutile surface for use as visible-light photocatalysts. Variation of the calcination temperature allowed the crystalline properties of the calcined TiO2 to be finely controlled. Chemical reduction using the Li/Ethylenediamine solution enables selective reduction of the rutile surface of the calcined TiO2, resulting in enhanced light absorption. When used as photocatalysts for hydrogen production under solar light conditions, the chemically-reduced TiO2 particles with both the disordered rutile surface and mixed crystalline phase showed significantly enhanced catalytic activity. |
