| 초록 |
TiO2 has been recognized as representative metal oxide semiconductor material with excellent photocatalytic activity due to its good stability, nontoxicity, and UV absorbance. However, the lack of visible light activity has been a critical issue due to the relatively large band gap. In this work, hierarchically organized mesoporous carbon-TiO2 (mC-TiO2) inverse opal nanostructures were synthesized by complementary colloid and block copolymer self-assembly, where the triblock copolymer P123 acts simultaneously as template and carbon source. Highly ordered mesoporous inverse opal nanostructures with nano-textured surface morphology and multiple-length scale nanopores provide increased light-activated surface area and scattering effects, leading to enhanced photoabsorption efficiency. A significant enhanced visible light photocatalytic activity was demonstrated for the mC-TiO2 inverse opal in terms of the degradation of p-nitrophenol and photoelectrochemical water splitting. |
