Preparation And Characterization Of TiO2/Ag2O Nano Particles In Degradation Photocatalyst Environmental Pollutants Direct Red 23 In Photo Reactor CFBR
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 11
Abstract
In this study, photocatalytic degradation of azo dye Direct Red 23(DR23) in aqueous solution using TiO2/Ag2O nano particles was employed to the degradation rate of dye enhances. Using of sol-gel method for synthesis nano particles TiO2/Ag2O. Nano particles have been characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), BET surface area analysis and Fourier transform infrared spectroscopy (FT-IR). A circulating fludized bed photo reactor (CFBR) with capacity 3 L, and equipped with a lamp UV-C (15 W) was used. The effect of operational parameters such as: pH, catalyst amount, dye concentration and H2O2 concentration were studied. The results showed that pH= 6, catalyst amount = 25 (mg/lit), dye concentration= 30 ppm and H2O2 concentration = 30 ppm was optimum conditions for this reaction. A first order reaction with k= 0.0678 min−1 was observed for the photocatalytic degradation reaction. The COD measurement results indicated that all organic substances were completely mineralized.
Authors and Affiliations
Reza Moradi, Javad Hossieni, Ali Bodaghi, Mehdi Abdolmaleki,
Keywords
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