Time (min.) | Pure ZnO (O.D.) | 1 + log O.D. | N-doped ZnO (O.D.) | 1 + log O.D. |
0 | 0.356 | 0.55 | 0.356 | 0.55 |
5 | 0.347 | 0.54 | 0.318 | 0.50 |
10 | 0.339 | 0.53 | 0.278 | 0.44 |
15 | 0.337 | 0.52 | 0.249 | 0.39 |
20 | 0.333 | 0.52 | 0.241 | 0.38 |
25 | 0.322 | 0.50 | 0.213 | 0.32 |
30 | 0.317 | 0.50 | 0.178 | 0.25 |
35 | 0.300 | 0.49 | 0.163 | 0.21 |
40 | 0.301 | 0.47 | 0.138 | 0.13 |