Publication: Photocatalytic degradation of Congo Red by hydrothermally synthesized nanocrystalline TiO2 and identification of degradation products by LC-MS
Date
Authors
Aksu, Songül Karaaslan
İzgi, Belgin
Authors
Erdemoğlu, Sema
Sayılkan, Funda
Asiltürk, Meltem
Sayılkan, Hikmet
Frimmel, Fritz
Güçer, Şeref
Advisor
Language
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Elsevier
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Volume Title
Abstract
Degradation of Congo Red (CR) dye in aqueous solutions was investigated by means of photocatalysis of TiO2 which was hydrothermally synthesized at 200 degrees C in 2 h, in anatase phase with 8 nm crystallite size. Efficiency of TiO2 in photocatalytic degradation under visible irradiation was studied by investigating the effects of amount of TiO2, irradiation time, initial CR concentration and pH. It was found that complete decolorization is achieved within 30 min of irradiation. Effects of nitrate and sulphate ions and humic acid on the degradation were also tested. The results were compared with Degussa P-25 TiO2 at the same degradation conditions. Degradation products were detected using LC-MS technique. The probable pathways for the formation of degradation products were proposed.
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Keywords
Congo red, Photocatalytic degradation, TiO2, Degradation product, LC-MS, Advanced oxidation, Azo-dyes, Efficiency, Powder, Water, Dyes, Liquid chromatography, Photocatalysis, Mass spectrometry, Nanocrystalline materials, Photocatalysis, Aqueous solution, Catalysis, Concentration (composition), Identification method, Irradiation, Oxide, pH, Photodegradation, Titanium
Citation
Erdemoğlu, S. vd. (2008).''Photocatalytic degradation of Congo Red by hydrothermally synthesized nanocrystalline TiO2 and identification of degradation products by LC-MS''. Journal of Hazardous Materials, 155(3), 469-476.