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Photocatalytic Mineralization of Methylene BlueAqueous Solutions by Ag/TiO2 Nano Composite | ||
Journal of Applied Chemical Research | ||
مقاله 1، دوره 6، شماره 4، دی 2012، صفحه 16-23 اصل مقاله (446.49 K) | ||
نوع مقاله: Research Paper | ||
نویسندگان | ||
Leila Torkian* ؛ Ehsan Amereh | ||
چکیده | ||
Nanocomposite of Ag/TiO2 and nanocrystalline TiO2 were prepared by using TiCl4 as a precursor in a simple sol-gel process. The prepared photo-catalysts were characterized by X-ray diffraction (XRD), scanning electron micrographs (SEM), energy dispersive X-ray microanalysis (EDX), transmission electron microscopy (TEM) and diffuse reflectance spectroscopy (DRS). A complete and effective photocatalytic degradation of a cationic aromatic dye, Methylene blue, in aqueous solutions has been carried out using nanocomposite of Ag/TiO2 and nanocrystalline TiO2 under UV-C light irradiation. Experiments were conducted to compare the photocatalytic activities of nanocomposite Ag/TiO2 with nanocrystalline TiO2 . The photoreactions were followed by monitoring the degradation of the dye as a function of irradiation time, in the presence of the nanophoto-catalysts, by the visible/ultraviolet absorption spectroscopy. It has been found that the presence of silver in TiO2 nanoparticles reduces the duration of complete photocatalytic degradation of Methylene blue by 20% due to the enhancement of electron-hole separation by the electron trapping of silver particles. | ||
کلیدواژهها | ||
Silver doped titaniananoparticles؛ Cationic aromatic dye؛ Sol-gel process؛ Photo-catalytic degradation | ||
آمار تعداد مشاهده مقاله: 861 تعداد دریافت فایل اصل مقاله: 460 |