الفهرس 
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Abstract
The organic pollutants such as organic dyes resulted from textile effluent showed hazardous effect in aquatic life that threaten the heath of soil, plant, animals and humans. In the regard of this point of view, the development of low-cost, less energy-intensive approaches are highly demanded. Recently, the visible light photocatalytic techniques gained great attentions from scientists due to the efficient catalytic performance under mild conditions. In this study, we aimed to develop efficient method for removing methylene blue (MB) contaminants in water. TiO2/Polyamide 11 (TiO2/PA-11) nanocomposite was synthesized from TiO2 nanoparticles and tested for MB dye degradation to CO2 and H2O under visible light irradiation. Different affecting parameters for the dye degradation were studied such as the catalyst loading and pH values. It was revealed that an aqueous solution of MB was degraded by more than 95٪ with TiO2/PA-11 (concentration=200 ppm) under visible light irradiation at 360 min. In another set of experiment, MB dye was degraded by more than 99٪ for 180 min with TiO2/PA-11 at pH 10. In addition, the removal of copper ions in aqueous solution was demonstrated. The adsorption process was afforded in 98.17٪ by using TiO2/PA-11 (200 mg/mL) at time (60 min), pH (7), temperature (30oC).