BET surface area and TRF charge carrier dynamics of doped and pristine Nb2O5, and the rate constant of MB photodegradation.
| Catalyst | BET surface area (±1 m2 g−1) | Lifetime of charge carriers τavg (ps) | MB adsorption rate constant ka (±0.1 h−1) | MB photodegradation rate constant km (±0.05 h−1) |
|---|---|---|---|---|
| Photolysis | — | — | — | 0.01 |
| Nb2O5 | 28 | 1088 | 1.6 | 0.19 |
| Nb2O5–Sr (0.1%) | 32 | 1223 | — | 0.42 |
| Nb2O5–Sr (0.25%) | 43 | 1290 | 2.3 | 0.60 |
| Nb2O5–Sr (2.5%) | 44 | 1212 | — | 0.41 |
| Nb2O5–Y (0.1%) | 38 | 1047 | — | 0.30 |
| Nb2O5–Y (0.25%) | 36 | 1241 | 2.2 | 0.49 |
| Nb2O5–Y (2.5%) | 33 | 1127 | — | 0.46 |
| Nb2O5–Zr (0.1%) | 36 | 1143 | — | 0.43 |
| Nb2O5–Zr (0.25%) | 38 | 1162 | 2.4 | 0.54 |
| Nb2O5–Zr (2.5%) | 41 | 904 | — | 0.42 |
| Nb2O5–Ag (0.1%) | 32 | 1202 | 2.3 | 0.58 |
| Nb2O5–Ag (0.25%) | 45 | 1029 | — | 0.47 |
| Nb2O5–Ag (2.5%) | 26 | 1084 | — | 0.40 |