A study on photocatalytic behaviors of activated carbon fibers impregnated with N-doped titania

Activated carbon fibers (ACFs) impregnated with N-doped titania were prepared via the sol–gel method and sonochemical synthesis. The photocatalytic behavior of rhodamine B showed that N-doped TiO₂/ACF nanocomposites exhibited enhanced photocatalytic activity. This result could be attributed to the synergistic effect between the high adsorption capacity of ACF and the visible light photocatalytic activity of N-doped TiO₂. In particular, the N-doped TiO₂/ACF nanocomposite that was sonicated four times had the highest photocatalytic efficiency and degradation rate, owing to the optimal N-doped TiO₂ loading and nanocomposite pore structure.