Review Article

Photocatalytic Based Degradation Processes of Lignin Derivatives

Figure 10

Variation of DC with time 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 coatings (TiO2-P25-SiO2 + Pt, TiO2-P25-SiO2, TiOSO4−30.6 wt%, ZnO + TiO2-P25-SiO2) [54].