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Oxidative degradation of organic pollutants utilizing molecular oxygen and visible light over a supported catalyst of Fe(bpy)32+ in water
- Source :
-
Applied Catalysis B: Environmental . Mar2004, Vol. 48 Issue 1, p17. 8p. - Publication Year :
- 2004
-
Abstract
- This article explores a supported catalyst of Fe(bpy)32+ on a cationic exchange resin (Amberlite IRA 200) as a photocatalyst for the degradation of organic pollutants by activating molecular oxygen under visible irradiation (<F>λ>420</F> nm) in water. Different from Fe(bpy)32+ which is not photoactive in solution, the supported catalyst exhibits a very efficient photoactivity for the degradation of N,N-dimethylaniline and the cationic dyes of Rhodamine B (RhB) and Malachite Green (MG) in an aerated aqueous medium. TOC removal yield was 75, 60 and 58%, respectively, after 700 min of visible light irradiation. The photocatalytic activity of the supported Fe(bpy)32+ remained unchanged after 22 cycles of over 100 h. The photocatalyst was characterized by UV-Vis diffuse reflectance, and X-ray photoelectron spectroscopies (XPS). EPR studies suggest that the active superoxide species {Fe(bpy)33+O2⋅−} are involved in the light-activated reaction. A reaction mechanism is proposed in the text. [Copyright &y& Elsevier]
- Subjects :
- *POLLUTANTS
*OXYGEN
*CATALYSTS
*PHOTOCATALYSIS
Subjects
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 48
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 12310677
- Full Text :
- https://doi.org/10.1016/j.apcatb.2003.09.003