Photocatalytic degradation of Congo Red by hydrothermally synthesized nanocrystalline TiO2 and identification of degradation products by LC-MS
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Output type: Journal article
Author list: Erdemoğlu, Aksu, Sayilkan, Izgi, Asiltürk, Sayilkan, Frimmel, Güçer
Publisher: Elsevier
Publication year: 2008
Journal: Journal of Hazardous Materials (0304-3894)
Volume number: 155
Issue number: 3
Start page: 469
End page: 476
Number of pages: 8
ISSN: 0304-3894
eISSN: 1873-3336
Languages: English-Great Britain (EN-GB)
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Open access status: closed
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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