Figure 8

The effect of recyclability of the as-synthesized QAD/TiO2 photocatalyst on its photocatalytic activity toward RB photodegradation under UV-A irradiation (experimental parameters: [Cat] = 1 g/L, pH 4, [RB] = 1 × 10–5 M, dark time = 1 h, UV-irradiation time = 3 h for each cycle).