Influence of plasma spraying parameter on microstructure and photocatalytic properties of nanostructured TiO2–Fe3O4 coating

TiO2–Fe3O4 coatings on transparent glasses were prepared by atmospheric plasma spraying (APS). As-sprayed TiO2–Fe3O4 coatings consist of anatase TiO2, rutile TiO2, Fe3O4 and FeTiO3. The grain size, rate of porosity and fractions of the anatase and TiFeO3 phases in APS coatings were dependent on the process parameters. With an increase in plasma power, the content of anatase TiO2 and the rate of porosity in the coatings were decreased while the content of the resultant FeTiO3 phase and the grain size in the coating were increased. The coating condition of 500 A has the best photocatalytic efficiency and 600 A has the worst. The photocatalytic property of the APS TiO2–Fe3O4 coatings was primarily dependent on synergistic effect of the fractions of FeTiO3 and anatase phases.

TiO2–Fe3O4 coatings on transparent glasses were prepared by atmospheric plasma spraying (APS). As-sprayed TiO2–Fe3O4 coatings consist of anatase TiO2, rutile TiO2, Fe3O4 and FeTiO3. The grain size, rate of porosity and fractions of the anatase and TiFeO3 phases in APS coatings were dependent on the process parameters. With an increase in plasma power, the content of anatase TiO2 and the rate of porosity in the coatings were decreased while the content of the resultant FeTiO3 phase and the grain size in the coating were increased. The coating condition of 500 A has the best photocatalytic efficiency and 600 A has the worst. The photocatalytic property of the APS TiO2–Fe3O4 coatings was primarily dependent on synergistic effect of the fractions of FeTiO3 and anatase phases.Figure optionsDownload as PowerPoint slide