Table 1.
Size (D) and surface area (S) of the oxides with rates of iodide ion-photooxidation*
| Oxide | D (nm) |
S (m2 g-1) |
Iodine-formation (nM s-1) | |
|---|---|---|---|---|
| Water | Acetonitrile | |||
| TiO2 (anatase) | 9 | 165 | 216 | 361 |
| TiO2 P25 (anatase:rutile::81:19) | 23 | 68 | 39 | 257 |
| TiO2 Hombikat (anatase:rutile::69:31) | 18 | 87 | 63 | 232 |
| TiO2 (rutile) | 12 | 123 | 2.5 | 24 |
| BaTiO3 | 41 | 24 | 5.4 | 27 |
| ZnO (wurtzite) | 32 | 33 | 6.9 | 93 |
| SnO2 | 27 | 31 | 2.4 | 21 |
| WO3 | 23 | 39 | 1.6 | 61 |
| CuO | 28 | 33 | 0.4 | 23 |
| Fe2O3 | 39 | 32 | 1.7 | 24 |
| Fe3O4 | 32 | 36 | 0.8 | 21 |
| ZrO2 | 25 | 42 | 1.1 | 20 |
| Al2O3 (γ:δ::65:35) | 11 | 148 | 8.9 | 32 |
| SiO2 | 15 | 160 ± 20 | 12 | 44 |
| SiO2 (porous) | 10 | 640 ± 50 | 6.5 | 27 |
*0.020 g oxide loading, 0.050 M iodide solution (25 mL), 7.8 mL s-1 airflow, 365 nm, 25.2 μEinstein L-1 s-1, 30 min illumination.