Table 1.
Material characteristics and photodegradation rate constants for all the samples.
| Samples | Ag2S mean size (nm) | Ag2S wt.% | Ti3+ (Ti 2p) | Ti3+ (O 1 s) | Bandgap (eV) | Rate Constant (min−1) |
|---|---|---|---|---|---|---|
| TiO2 | — | — | 5.7 | 27.4 | 3.2 | 0.011 |
| Ag2S@TiO2 (tdip = 0.5 min) | 10.6 ± 2.3 | 4 | — | — | 3.0 | 0.015 |
| Ag2S@TiO2 (tdip = 1.0 min) | 16.7 ± 3.1 | 10 | 6.7 | 30.2 | 2.85 | 0.019 |
| Ag2S@TiO2 (tdip = 1.0 min) +UV-O3 treated | 8.2 | 47.7 | 2.60 | 0.030 | ||
| Ag2S@TiO2 (tdip = 2.0 min) | 23.2 ± 8.7 | 18 | — | — | 2.75 | 0.014 |
| Ag2S@TiO2 (tdip = 4.0 min) | 39.9 ± 12.5 | 29 | — | — | — | 0.009 |