Photocatalytic degradation of formaldehyde by nanostructured TiO₂composite films

Interest in the photocatalytic oxidation of formaldehyde from contaminated wastewater is growing rapidly.The photocatalytic activity of the nanocrystalline Fe 3C /F co-doped TiO 2 SiO 2 composite film for the degradation of formaldehyde solution under visible light was discussed in this study.The films were characterised by field emission scanning electron microscopy (FE-SEM) equipped with energy-dispersive spectroscopy, X-ray diffraction (XRD), BET surface area, UVVis absorption spectroscopy, and photoluminescence spectroscopy.The FE-SEM results revealed that the Fe 3C /F co-doped TiO 2 SiO 2 film was composed of uniform round-like nanoparticles or aggregates with the size range of 510 nm.The XRD results indicated that only the anatase phase was observed in the film.Compared with a pure TiO 2 film and a singly modified TiO 2 film, the Fe 3C /F co-doped TiO 2 SiO 2 composite film showed the best photocatalytic properties due to its strong visible light adsorption and diminished electrons-holes recombination.