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| Photocatalyst | k × 10−3 (min−1) | t 1/2 (h) |
|---|---|---|
| Al2O3 | 3.4 | 3.36 |
| Ag/Al2O3 | 9.1 | 1.27 |
| Ag/Al–Gd-2 | 3.4 | 39 |
| Ag/Al–Gd-5 | 9.3 | 24 |
| Al–Gd-15 | 9.5 | 1.22 |
| Ag/Al–Gd-15 | 13.8 | 84 |
| Ag/Al–Gd-25 | 14.5 | 80 |
| Ag/Al–Gd-50 | 8.0 | 44 |
| Ag/Gd2O3 | 1.6 | 7.00 |
