Photocatalytic Degradation of Phenol Using Immobilized TiO₂ Nanotube Photocatalysts

Figure 6

Photocatalytic performance of different silica gel loading in the phenol degradation. Conditions: TiO₂ nanotubes and colloidal silica in the catalyst were 0.12 and 0.80 g/L, respectively, air flow rate = 0.3 L/min, initial phenol concentration = 30 mg/L, and medium pH = 3.