Influence of operational parameters on the TiO2 photocatalytic degradation of Methylene blue. Issue 12 (12th August 2016)

• Record Type: Journal Article
• Authors: Sohrabi, H.; Mozafari, A.; Sajjadnejad, M.; Tabaian, S. H.; Omidvar, H.
• Is Part Of: Materials science and technology. Volume 32:Issue 12(2016)
• Page Start: 1282
• Page End: 1288
• Publication Date: 2016-08-12
• Subjects: Sol–gel -- TiO2 -- Methylene blue -- Nanoparticles -- Photocatalysis; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2015.1116762
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : Thin films of titanium oxide were obtained by dip-coating, using the sol–gel method. TiO2 powder (Degussa, P25) and polyethylene glycol (PEG) were added to enhance the photocatalytic properties of resulting films. Effects of experimental variables on the photocatalytic properties of the coatings were evaluated based on the degradation efficiency of the reference dye (Methylene blue). The photocatalytic activity of resulting TiO2 coatings was improved with the loading of TiO2 powder (Degussa, P25) and PEG in the sols. The electron-hole pair photogeneration increases with the energy of irradiation and improves photocatalytic efficiency. Increasing coating thickness leads to a rough surface with more reaction sites. Photodegradation conversion of Methylene blue (Mb) decreases with an increase in the initial concentration of Mb.