Photocatalytic degradation of formaldehyde by nanostructured TiO2 composite films |
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| Authors: | Wei Zhang Na Song Ling-xiao Guan Fang Li |
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| Affiliation: | 1. Key Laboratory of Chemical Sensing &2. Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China;3. School of Chemistry and Chemical Engineering, Ningxia Normal University, Guyuan 75600, PR China |
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| Abstract: | Interest in the photocatalytic oxidation of formaldehyde from contaminated wastewater is growing rapidly. The photocatalytic activity of the nanocrystalline Fe3+/F? co-doped TiO2–SiO2 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, UV–Vis absorption spectroscopy, and photoluminescence spectroscopy. The FE-SEM results revealed that the Fe3+/F? co-doped TiO2–SiO2 film was composed of uniform round-like nanoparticles or aggregates with the size range of 5–10 nm. The XRD results indicated that only the anatase phase was observed in the film. Compared with a pure TiO2 film and a singly modified TiO2 film, the Fe3+/F? co-doped TiO2–SiO2 composite film showed the best photocatalytic properties due to its strong visible light adsorption and diminished electrons-holes recombination. |
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| Keywords: | TiO2–SiO2 composite Fe3+/F? doping formaldehyde photodegradation |
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