| 초록 |
TiO2 is a wide band gap semiconductor and can only absorb UV light, resulting in its inefficient utilization of solar energy. For an optimized utilization of solar energy, combining TiO2 with other semiconductors to form heterojunctions is an effective way of enhancing photocatalytic activity by inducing visible light absorption. We fabricated a visible-light-driven photocatalyst through chemical bonding between TiO2 and semiconducting conjugated polymer (CP). The interfacial chemical bonding between TiO2 and CP can acts as a pathway, which rapidly transfer the excited electrons from CP to conduction band of TiO2, resulting in significant increase in photocatalytic efficiency. Furthermore, the photocatalyst can convert the hydrophobicity of the surface to hydrophilic by modifying the CP on the photocatalyst surface. This wettability switching of the photocatalyst surface allows the photocatalyst to be used with high efficiency in various media. |
