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Iron(III) oxide acts as a pigment, in paints, coatings and colored concretes, used in thermalite. Iron oxide is a low cost, nontoxic, ecofriendly catalyst for various reactions such as the oxidation of carbon monoxide, reduction of nitrogen oxides and sulfur dioxide by CO, photocatalytic splitting of water, Fischer-Tropsch synthesis of hydrocarbons, catalytic decomposition of industrial dyes, water-gas shift reactions, nucleation of diamonds, conversion of phenolic and other environmentally harmful aromatic compounds, dehydrogenation of ethylbenzene to styrene and catalytic oxidations of various organic compounds. It is used in magnetic storage devices and in the production of iron, steel and alloys. It functions as a catalyst in the chemical oxidation of hydrogen peroxide used for the treatment of contaminated water with hydrogen peroxide.
Palchoudhury, S.; An, W.; Xu, Y.; Qin, Y.; Zhang, Z.; Chopra, N.; Holler, R. A.; Turner, C. H.; Bao, Y. Synthesis and Growth Mechanism of Iron Oxide Nanowhiskers. Nano Lett. 2011, 11 (3), 1141-1146.
Qi, J.; Li, X.; Zheng, H.; Li, P.; Wang, H. Simultaneous removal of methylene blue and copper (II) ions by photoelectron catalytic oxidation using stannic oxide modified iron (III) oxide composite electrodes. J. Hazard. Mater. 2015, 293, 105-111.