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Document Type |
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Thesis |
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Document Title |
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NEW MATERIALS FOR HEAVY METALS REMOVAL FROM INDUSTRIAL WASTEWATER مواد جديدة للتخلص من العناصر الثقيلة من مياه الصرف الصناعي |
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Subject |
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Faculty of Science |
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Document Language |
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Arabic |
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Abstract |
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Environmental pollution is a global and serious problem especially water pollution with heavy metal ions. This work focuses on studying the performance of metal/metal oxides-rGO nanocomposite in adsorption and photocatalytic reduction for removal of lead ion in an aqueous medium. A number of metal oxides, including zinc oxide as one of the most commonly used semiconductors in photocatalysis process were prepared by hydrothermal method, then utilizing these photocatalysts to eliminate lead ion in aqueous mediums under visible light. However, the bandgap of most semiconductors such as ZnO (3.30 eV) are large, wavelengths below 400 nm are necessary for excitation, which represents 5% of the sunlight and the charge carrier recombination of photo-generated electron/hole pairs occurs within nanoseconds leading to low activity in visible light. Thus, it was necessary to better its activities, by transforming absorption threshold from the UV-region to the visible-region, through-loading Ag and rGO to change the properties of prepared photocatalysts. Ag/metal oxides-rGO were prepared by hydrothermal technique. The textural features of prepared photocatalyst were characterized by different techniques such as XRD, BET, TEM, UV-Vis/DR and fluorescence spectrometer PL. Finally, the effect of loading silver and rGO on the photocatalytic oxidation process of lead ion. were studied. Here, we obtain an effective nanoparticle photocatalyst for removal lead ion in aqueous medium, which would allow us to study the activity of such photocatalyst towards the removal of heavy metal ions. |
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Supervisor |
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Prof. Dr. Reda Mohamedy Mohammed Pro |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1441 AH
2019 AD |
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Co-Supervisor |
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Prof. Dr. Ibraheem Ahmed Mkhalid |
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Added Date |
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Wednesday, December 4, 2019 |
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Researchers
| هيام حسن عسيري | Assiri, Hayam Hassan | Researcher | Master | |
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