Marinović, Veronika and Ljubas, Davor and Ćurković, Lidija (2016) Effects of concentration and UV radiation wavelengths on photolytic and photocatalytic degradation of azo dyes aqueous solutions by sol-gel TiO2 films. = Effects of concentration and UV radiation wavelengths on photolytic and photocatalytic degradation of azo dyes aqueous solutions by sol-gel TiO2 films. The Holistic Approach to Environment, 7 (1). pp. 3-14. ISSN 1848-0071. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. . Točan broj autora: 3.
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Effects of concentration and UV radiation wavelengths on photolytic and photocatalytic degradation of azo dyes aqueous solutions by sol-gel TiO2 films.pdf - Published Version Jezik dokumenta:English Download (590kB) | Preview |
Abstract
The photocatalytic and photolytic degradation of anionic azo dyes Methyl Orange and Congo Red dye aqueous solutions was investigated in glass reactors with/without TiO2 films that were irradiated with UV light. Two nanostructured sol-gel TiO2 films were prepared by means of the dip-coating technique with and without of polyethylene glycol (PEG) as a structure- directing agent. Experiments were carried out by varying the concentration of dyes, TiO2 films and sources of UV radiation. The concentrations of dyes were 0.0125 mmol L-1, 0.025 mmol L-1 and 0.05 mmol L-1 ; the wavelengths of the incident ultraviolet light were predominantly 254 (UV-C) and 365 nm (UV- A). In the presence of TiO2 film UV-C radiation showed higher degradation efficiency for both dyes than UV-A radiation. Also, UV-C radiation without TiO2 photocatalyst was capable of degrading both dyes, while UV-A radiation alone did not show a potential for dyes degradation. Higher photoactivity showed TiO2 film with addition of PEG.
Item Type: | Article (["eprint_fieldopt_article_type_article" not defined]) |
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Keywords (Croatian): | UV radiation, TiO2 film, Congo red dye, Methyl Orange dye, photocatalysis, photolysis |
Divisions: | 1000 Department of Materials > 1010 Chair of Materials and Tribology 500 Department of Energy, Power Engineering and Environment > 540 Chair of Water and Environmental Engineering |
Indexed in Web of Science: | No |
Indexed in Current Contents: | No |
Date Deposited: | 13 Apr 2016 12:01 |
Last Modified: | 29 Aug 2017 12:09 |
URI: | http://repozitorij.fsb.hr/id/eprint/5600 |
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