Review Article
Heterogeneous Photo-Fenton Reaction Catalyzed by Nanosized Iron Oxides for Water Treatment
Table 2
Preparation methods of iron oxides.
| Nomenclature | Chemical | Preparation methods | Reference |
| Nanorod, nanosphere, and nanohexagon | α-Fe2O3 | Hydrothermal | [50] | Nanohematite | α-Fe2O3 | Hydrothermal | [51, 52] | — | α-Fe2O3 | Chemical precipitation | [53] | — | — | High-energy ball milling | [54] | Nanocomposite | Fe2O3/SiO2 | Sol-gel method | [16, 55] | Maghemite (7-8 nm) | — | Microemulsion method | [56] | Fe/SBA-15 | Hematite | Two solvent impregnation technique | [57] | | α-Fe2O3 | Solvent thermal | [45]
| Flower-like hierarchical α-Fe2O3 | α-Fe2O3 | Vapor-solid growth | [58] | | α-Fe2O3 | Solution-combustion | [59] | Flower-like hematite | — | Complexation-mediated oxidation-hydrolysis | [60] | Nanocrystals | α-Fe2O3 | Convenient organic phase process | [61] | Nanoparticle | α-Fe2O3 | conducting controlled oxidation reactions | [62] | Nanocube | α-Fe2O3 | — | [63] | Nanospindle | α-Fe2O3 | — | [64] | Nanorod | α-Fe2O3 | Ethylenediamine-(EDA-) assisted method | [65, 66] | Nanowire | α-Fe2O3 | Oxidation of pure iron | [67] | Nanotube | — | Solutionphase approach | [52, 68] | Nanobelt | α-Fe2O3 | Direct thermal oxidation | [69] | Nanoflake | α-Fe2O3 | Deposition | [70] |
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