الفهرس 
Nanomaterials and NanotechnologyOnly 14 pages are availabe for public view
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Abstract
In recent years, problems of waste water become very important, wastewater from the textile industry are characterized by high color, which is a serious problem.Many processes have been proposed over the years and are currently used to remove organic toxins from wastewaters. Current treatment methods for these contaminants, such as adsorption by activated carbon and air stripping, merely concentrate the chemical present, by transferring them to the adsorbent or air ,but they do not convert them into nontoxic wastes. Anthor advantage of the photocatalytic process that these oxides can be used instead of the expensive oxidants as H2O2 and O3. Photocatalyst are also self regenerated and can be recycled.
Finally, the solar photocatalytic process can be applied to destroy odor compounds and naturally occurring organic matter.
Thus we focus first on studying photodegradation process of a model compound DSB5B and MBRH33) using TiO2 in different media. The aim is to determine the optimum condition to obtain the highest rate of photodegradation (optimum concentration, optimum pH).
Also, the three nanoxide (CuO, Al2O3 and Fe3O4) in different solvent are used to degrade the two studied dyes mentioned above. The aim is to determine the optimum condition to obtain the hights rate of photodegradation (optimum concentration, optimum pH).
This work focused on the synthesis of new metal oxide nanocatalysts (CuO, Fe3O4, and Al2O3) for enhancement the rate of photocatalytic degradation.
The thesis include three chapters
Chapter One: contains a general introduction of the subject and a literature review
Chapter Two: include materials, Instruments, preparations and general procedures, methods of data analysis and handling.
Chapter three: This chapter gives the obtained results and discussion.
The following techniques are used to analyze the obtained data
1- XRD analysis was used to characterize the prepared oxides.
2- The TEM images reveal that all particles are in the nanosize.
3- DSB5B and MBRH33 dyes absorb strongly in the visible region at λmax= 442 nm and λmax = 600 nm, respectively. So they have suitable band gap and less energy are expected for photodegradation of the studied dyes.
4- Photostability of DSB5B and MBRH33 dyes was studied in aqueous medium under UV irradiation by measuring the absorbance change of the dye.
5- Rate of photocatalytic degradation of DSB5B and MBRH33 dyes increase by using the oxides (CuO, Fe3O4, and Al2O3) which was found to be higher than degradation using TiO2. It was generally found that photodegradation depends on the pH for some oxides and pH has no effect for others. Also, the amount used played an important role.
6- The studied oxides are cheap and were found effective as photocatalysts.