Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 264, Issue -, Pages 71-78Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2013.10.070
Keywords
Binary oxide catalyst; Zinc oxide; Cerium oxide; Catalyst; Photodegradation; MTBE
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Funding
- King Abdul Aziz City for Science and Technology (KACST) through the Science & Technology Unit at Umm Al-Qura University [10-wat1240-10]
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A series of binary oxide catalysts (ceria-ZnO) were prepared and doped with different amounts of palladium in the range of 0.5%-1.5%. The prepared catalysts were characterized by SEM, TEM, XRD and XPS, as well as by N-2 sorptiometry study. The XPS results confirmed the structure of the Pd CeO2-x-ZnO. The photocatalytic activity of these catalysts was evaluated for degradation of MTBE in water. These photocatalyst efficiently degrade a 100 ppm aqueous solution of MTBE upon UV irradiation for 5 h in the presence of 100 mg of each of these photocatalysts. The removal of 99.6% of the MTBE was achieved with the ceria-ZnO catalyst doped with 1% Pd. In addition to the Pd loading, the N-2 sorptiometry study introduced other factors that might affect the catalytic efficiency is the catalyst average pore sizes. The photoreaction was determined to be a first order reaction. (C) 2013 Elsevier B.V. All rights reserved.
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