Study on Degradation of Lignin by TiO2-based Photocatalyst Doped with Carbon Dots

The carbon dots were prepared by the microwave method, and then TiO2 doped with was successfully synthesized hydrothermal method. Its structure investigated using TEM, XRD XPS. catalyst applied to degradation of lignin base solution (50 mg in 30 mL sodium hydroxide pH = 12) under ultraviolet light. It found that when mass ratio point 1.5:1, dosage 0.75 g/L, time 6 h, rate could reach more than 45%. 40% be maintained after seven cycles, indicating had good photocatalytic cycle stability. products analyzed GC-MS, main n-butyl acetate, butyl phthalate alkanes long chains.