Photocatalytic Based Degradation Processes of Lignin Derivatives

Figure 8

Time dependent UV-Vis absorption spectra of aqueous lignin solution from waste paper water irradiated with UV light (280–420 nm) for different time intervals. The spectra are obtained for sol-gel derived TiO₂ nanocrystalline coating (TiO₂-P25-SiO₂) [54].