Rate constants and degree of degradation of prepared nanoparticles.
| Nanoparticles | MB concentration (ppm) | Degree of degradation (%) | r 2 | Rate constants (min−1) |
|---|---|---|---|---|
| Pure Mn3O4 | 50 | 95 | 0.968 | 0.0171 |
| 1% Ni doped Mn3O4 | 98 | 0.973 | 0.0272 | |
| 3% Ni doped Mn3O4 | 98 | 0.983 | 0.0273 | |
| 5% Ni doped Mn3O4 | 98 | 0.989 | 0.0339 | |
| 7% Ni doped Mn3O4 | 98 | 0.990 | 0.0342 | |
| 10% Ni doped Mn3O4 | 98 | 0.989 | 0.0275 |