Abstract
Recently, hematite coatings with semiconductor properties have received attention for photocatalytic applications. In this study, plasma and flame spraying techniques were used for hematite deposition on 316 stainless steel plates. X-ray diffraction was used for phase composition analysis, and methylene blue was used as an organic pollutant to evaluate the photocatalytic activity of thermally sprayed coatings. The results showed that all these coatings could act under visible-light irradiation but the one deposited by flame spraying at 20 cm stand-off distance showed the highest photocatalytic activity. The results showed that wavelength of the light source and pH of the solution affected the photocatalytic activity significantly. It was also shown that thermally sprayed iron oxide coatings could have a high photo-absorption ability, which could positively affect the photocatalytic activity.
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Navidpour, A.H., Salehi, M., Amirnasr, M. et al. Photocatalytic Iron Oxide Coatings Produced by Thermal Spraying Process. J Therm Spray Tech 24, 1487–1497 (2015). https://doi.org/10.1007/s11666-015-0328-x
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DOI: https://doi.org/10.1007/s11666-015-0328-x