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Absorption peaks and bandgap energy of the synthesized TiO2 NP (Tma, Tmb, Tmc, Tmd and Tme) and CdS-TiO2.
| Nanoparticle | Absorption edge (nm) | Band gap (eV) (from Tauc curve) | Band gap (eV) (Eg = 1240/λonset) | Particle size (nm) |
|---|---|---|---|---|
| Tma | 403 | 3.07 | 3.074 | 0.522 |
| Tmb | 393 | 3.14 | 3.155 | 0.208 |
| Tmc | 390 | 3.17 | 3.179 | 0.188 |
| Tmd | 388 | 3.2 | 3.195 | 0.161 |
| Tme | 382 | 3.25 | 3.246 | 0.125 |
| CdS-TiO2 | 487, 388 | 2.55, 3.2 | 2.546, 3.195 | 5.8, 0.161 |
