Table 1.
Primary physicochemical characteristics of the particulate TiO2 materials and hydrodynamic sizes in exposure dispersions.
| Electron Microscopy images | Sample material | Product name | Phase(s) | Crystallite size for primary particles (nm) | Surface area BET (m2/g) |
Minor elements/surface coatings on the primary particles (wt%) | Particle size in exposure dispersions (nm ± SD) | |
|---|---|---|---|---|---|---|---|---|
| unfiltered | 3.0 μm filter | |||||||
 |
Fine TiO2 (fTiO2) | RDI-S | 99.5% rutile 0.5% anatase |
288 | 21 | Al2O: 3.22 P2O5: 0.12 ZrO2: 0.07 §Polyol: 1.3 |
3415.8 ± 228.3 |
560.9 ± 162.0 |
 |
Photocatalytic TiO2 (pTiO2) | VP Disp. W 2730 X | 7.8% rutile 92.2% anatase |
19 12 |
N.A. | Al2O3: 0.10 | NA | 2320.5 ± 272.6 |
 |
NanoTiO2 (nTiO2) | UV-Titan L181 | 100% rutile | 20.6 | 107.7 | Na2O: 0.60 SiO2: 12.01 Al2O3: 4.58 ZrO2: 1.17 §Polyol: 5.2 |
5223.5 ± 831.6 |
518.2 ± 118.2 |
§ Compound according to the manufacturer