| Table I: List of the metal-based NPs used in this study | |||||
| NPs | Primary Particle Diameters (nm) | Purity (%) | Bulk Density (kg/m3) | Surface coating | Vendor |
| Hematite (α-Fe2O3) | 50, 80, 100, and 120 | N.A | 5300 | No coating | Lab-synthesized |
| TiO2 | 25 | 99.70 | 4230 | No coating | Aldrich |
| CeO2 | 25 | 99.95 | 7650 | No coating | Aldrich |
| ZnO | 50 | 99.90 | 5610 | No coating | Aldrich |
| Al2O3 | 25 40 | 99.97 99.00 | 3950 | No coating | Nanostructured &AmorphousMaterials |
| Ag | 80 | 99.00 | 10500 | Citrate | Ted Pella |