Preparation and photocatalytic activity of immobilized composite photocatalyst (titania nanoparticle/activated carbon) |
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Authors: | Niyaz Mohammad Mahmoodi Mokhtar Arami |
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Affiliation: | a Textile Engineering Department, Amirkabir University of Technology, Tehran, Iran b Department of Environmental Research, Institute for Color Science and Technology, Tehran, Iran c Department of Chemical & Biological Engineering, University of Ottawa, Ottawa, Canada |
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Abstract: | An immobilized composite photocatalyst, titania (TiO2) nanoparticle/activated carbon (AC), was prepared and its photocatalytic activity on the degradation of textile dyes was tested. AC was prepared using Canola hull. Basic Red 18 (BR18) and Basic Red 46 (BR46) were used as model dyes. Fourier transform infrared (FTIR), wavelength dispersive X-ray spectroscopy (WDX), scanning electron microscopy (SEM), UV-vis spectrophotometry, chemical oxygen demand (COD) and ion chromatography (IC) analyses were employed. The effects of reaction parameters such as weight percent (wt.%) of activated carbon, pH, dye concentration and anions (NO3−, Cl−, SO42−, HCO3− and CO32−) were investigated on dye degradation. Data showed that dyes were decolorized and degraded using novel immobilized composite photocatalyst. Formate, acetate and oxalate anions were detected as dominant aliphatic intermediates where, they were further oxidized slowly to CO2. Nitrate, chloride and sulfate anions were detected as the photocatalytic mineralization products of dyes. Results show that novel immobilized composite photocatalyst with 2 wt.% of AC is the most effective novel immobilized composite photocatalyst to degrade of textile dyes. |
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Keywords: | Immobilized composite photocatalyst Titania nanoparticle/activated carbon (AC) Preparation Photocatalytic activity Degradation Mineralization |
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