Table 3 The pseudo-first-order kinetic constant of photocatalysts for the degradation of MB (0.1 mg mL−1 of photocatalyst, 20 ppm of MB, 50 mW cm−2 intensity of light, 25°C)
Sample | k1 (min−1) | |||
|---|---|---|---|---|
UV light | R2 | Visible light | R2 | |
TiO2 | 0.031 | 0.97 | 0 | –- |
GTN111 | 0.053 | 0.96 | 0.0365 | 0.95 |
GTN211 | 0.050 | 0.98 | 0.0621 | 0.98 |
GTN311 | 0.052 | 0.99 | 0.0593 | 0.97 |
GTN411 | 0.057 | 0.99 | 0.0441 | 0.96 |