کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
68360 | 48512 | 2006 | 5 صفحه PDF | دانلود رایگان |
Simultaneous photocatalytic degradation of non-emissive dye, acid blue1 (AB1) and emissive dyes (eosinY or thionine) in air-equilibrated aqueous suspension of TiO2 semiconductor photocatalyst has been achieved at ambient conditions. Under visible light irradiation AB1 undergoes appreciable degradation in presence of a sensitizing dye (eosinY or thionine). However, concomitant decoloration of eosinY (EY) or thionine (Th) due to self-sensitized degradation was also noticed. Mechanistic proposals for the photocatalytic degradation of AB1 using a 150 W Xe lamp with a UV-filter (λ > 420 nm) as well as without a UV-filter, are discussed. Formation of reactive O2−/HO2 radicals is proposed to be responsible for the degradation of the selected dyes, AB1, EY and Th.
Under visible light irradiation acid blue1 undergoes appreciable degradation in presence of a sensitizing dye (eosinY or thionine). However, concomitant disappearance of eosinY or thionine due self-sensitized degradation was also noticed. Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 260, Issues 1–2, 15 December 2006, Pages 264–268