title: Photocatalytic degradation of Congo Red by hydrothermally synthesized nanocrystalline TiO2 and identification of degradation products by LC-MS.
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.
authors: Inönü University, Faculty of Arts and Science, Department of Chemistry, 44280 Malatya, Turkey. sbilmez@inonu.edu.tr <sbilmez@inonu.edu.tr>
authors: Sema
authors: S
authors: Erdemoğlu
authors: Songül Karaaslan
authors: SK
authors: Aksu
authors: Funda
authors: F
authors: Sayilkan
authors: Belgin
authors: B
authors: Izgi
authors: Meltem
authors: M
authors: Asiltürk
authors: Hikmet
authors: H
authors: Sayilkan
authors: Fritz
authors: F
authors: Frimmel
authors: Seref
authors: S
authors: Güçer
mesh_terms: D002384:Catalysis; D002853:Chromatography, Liquid / Q000379:methods*; D003224:Congo Red / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D013058:Mass Spectrometry / Q000379:methods*; D053758:Nanoparticles; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D003224:Congo Red; D014025:Titanium