Abstract
Porous surface-fluorinated TiO 2 (F-TiO 2) films were prepared through PEG modified sol–gel method and surface fluorination. The as-prepared films were characterized with XRD, FTIR, AFM, XPS and UV–vis DRS. The effects of surface fluorination on the photocatalytic activity and hydrophilicity of porous TiO 2 film were studied by photocatalytic degradation of rhodamine B (RhB) as well as water contact angle (CA) on porous TiO 2 film. The results showed that the surface fluorination increased the adsorption of RhB on the porous TiO 2 film and enhanced the photocatalytic degradation of RhB. The concentration and pH of NaF solutions affected much the photocatalytic activity of porous TiO 2 film. Porous F-TiO 2 film prepared in 40 mM NaF solution at pH 4.0 showed the highest photocatalytic activity. Because of its porous structure, the porous F-TiO 2 film had original water CA of 22.7°, which is much smaller than that of normal F-TiO 2 film. Under UV light irradiation, the water CA of porous F-TiO 2 film decreased to 5.1° in 90 min.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
