PHOTOCATALYTIC DEGRADATION OF THE POLYCYCLIC AROMATIC HYDROCARBON "ANTHRACENE" IN WATER USING UV-IRRADIATION AND THIN-LAYERED TRANSITION METAL OXIDE PHOTOCATALYSTS | ||
| The International Conference on Chemical and Environmental Engineering | ||
| Article 13, Volume 3, 3rd International Conference On Chemical & Environmental Engineering, May 2006, Pages 155-166 PDF (531.92 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/iccee.2006.41065 | ||
| Authors | ||
| Aboul-Gheit A. K.; Mahmoud S. A.; Moustafa Y. M.* | ||
| Egyptian Petroleum Research Institute. | ||
| Abstract | ||
| ABSTRACT TiO2, ZnO and mixed TiO2+ZnO photocatalysts in the form of thin layers mounted on 2.5 x 2.5 cm glass sheets were prepared and tested for the photocatalytic degradation of 25 ppm anthrecene in its aqueous solution using a medium-pressure 6W-UV lamp irradiating at a wave length of 254 nm as an irradiation source and a reactor made of silica glass. Analysis of the produced intermediates and the remaining anthracene after consecutive irradiation periods was achieved mainly by HPLC and GC/MS spectroscopy. The catalysts were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM). The activities of the current photo-catalysts were found to be in the order: TiO2 > ZnO > TiO2/ZnO. The same intermediates formed in the photodegradation of anthracene using TiO2 and ZnO catalysts are produced, whereas using the TiO2/ZnO catalyst most of these intermediates disappear, probably due to difference in the adsorption/desorption behaviours of these catalysts. Organic acids were the predominant intermediates on all catalysts; they are the most resistive against photocatalytic degradation. | ||
| Keywords | ||
| Photocatalytic degradation; transition metals; TiO2; ZnO; UV irradiation | ||
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