724095.fig.006a
(a)
724095.fig.006b
(b)
Figure 6: Effect of initial phenol concentration on its conversion. Experimental conditions: TiO2 concentration = 0.1 g·L−1; pH = 5.9;  K. (a) Variations of values during phenol photodegradation: 1—0.266 mM; 2—0.532 mM; 3—1.064 mM; 4—1.596 mM; (b) and values of phenol solution after reaction.