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Table 1 Size (D) and surface area (S) of the oxides with rates of iodide ion-photooxidation*

From: Photoproduction of iodine with nanoparticulate semiconductors and insulators

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
  1. *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.