Table 4. Influence of UV–Ozone Treatment or Storage at Ambient Conditions on O 1s Signalsa.
| O bound to saturated Ti (I) | O bound to unsaturated Ti (II) | –OH and CO2 groups (III) | |
|---|---|---|---|
| annealed | 77% | 15% | 8% |
| annealed and UV–ozone treated | 82% | 9% | 9% |
| annealed after 24 h | 59% | 15% | 26% |
a
For the freshly annealed samples, we calculated the following energies: (I) 530.0 eV, (II) 531.1 eV, and 532.2 eV. For the annealed and UV–ozone-treated sample, peak maxima were calculated at (I) 530.1 eV, (II) 530.9 eV, and (III) 532.0 eV. For the annealed samples that were kept in ambient conditions for 24 h, we calculated the following energies: (I) 530.1 eV, (II) 531.6 eV, and 532.2 eV.