title: Preparation and characterization of Pd doped ceria-ZnO nanocomposite catalyst for methyl tert-butyl ether (MTBE) photodegradation.
abstract: 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 N2 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 100ppm aqueous solution of MTBE upon UV irradiation for 5h in the presence of 100mg 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 N2 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.
authors.affiliation: Chemistry Department, Umm Al-Qura University, Makkah, Saudi Arabia.
authors.forename: Zaki S
authors.initials: ZS
authors.lastname: Seddigi
authors.affiliation: Chemistry Department, Faculty of Science, Kuwait University, Kuwait.
authors.forename: Ali
authors.initials: A
authors.lastname: Bumajdad
authors.affiliation: Chemistry Department, Umm Al-Qura University, Makkah, Saudi Arabia.
authors.forename: Shahid P
authors.initials: SP
authors.lastname: Ansari
authors.affiliation: Chemistry Department, Umm Al-Qura University, Makkah, Saudi Arabia. Electronic address: saleh_63@hotmail.com.
authors.forename: Saleh A
authors.initials: SA
authors.lastname: Ahmed
authors.affiliation: Chemistry Department, King Abdulaziz University, Jeddah, Saudi Arabia.
authors.forename: Ekram Y
authors.initials: EY
authors.lastname: Danish
authors.affiliation: Chemistry Department, Umm Al-Qura University, Makkah, Saudi Arabia.
authors.forename: Naeema H
authors.initials: NH
authors.lastname: Yarkandi
authors.affiliation: Center for Refining & Petrochemicals, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
authors.forename: Shakeel
authors.initials: S
authors.lastname: Ahmed
mesh_terms: D004785:Environmental Pollutants / Q000737:chemistry* / Q000528:radiation effects; D008738:Methyl Ethers / Q000737:chemistry* / Q000528:radiation effects; D008854:Microscopy, Electron; D053761:Nanocomposites / Q000737:chemistry*; D009584:Nitrogen; D010165:Palladium / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D010782:Photolysis; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D004785:Environmental Pollutants; D008738:Methyl Ethers; C043243:methyl tert-butyl ether; D010165:Palladium; D009584:Nitrogen; D015034:Zinc Oxide
keywords: Binary oxide catalyst; Catalyst; Cerium oxide; MTBE.; Photodegradation; Zinc oxide