Photocatalytic oxidation of Auramine O in the presence of semiconducting oxides

✍ Scribed by I Poulios; A Avranas; E Rekliti; A Zouboulis

• Publisher: Wiley (John Wiley & Sons)
• Year: 2000
• Tongue: English
• Weight: 130 KB
• Volume: 75
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(200003)75:3<205::aid-jctb201>3.0.co;2-l

✦ Synopsis

The photocatalytic degradation of Auramine O, a diarylmethane ¯uorescent dye, has been investigated in aqueous heterogeneous solutions containing semiconductor oxides as photocatalysts. The disappearance of the organic molecule follows approximately a pseudo-®rst order kinetics according to the Langmuir±Hinshelwood model. CO 2 and NH 4 ions have been identi®ed as mineralization products. Various commercial photocatalysts are compared with respect to their decolorization ef®ciency, as well as the production of CO 2 . The effect of pH and H 2 O 2 on the reaction rate is ascertained.