Photocatalytic degradation of organic dye using titanium dioxide modified with metal and non-metal deposition |
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| Affiliation: | 1. Department of Physics, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;2. Advanced Surface Engineering and Nano Materials Research Center, Department of Physics, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;3. Department of Physics, Masjed-Soleiman Branch, Islamic Azad University (I.A.U.), Masjed-Soleiman, Iran;1. Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran;2. Chemical Engineering Department, Islamic Azad University, Shahreza Branch, Iran;3. Chemical Engineering Department, Naghshe Jahan Institute of Higher Education, Baharestan, Isfahan, Iran |
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| Abstract: | In this study, photocatalytic degradation of methyl orange (MO) as an example of organic dye was investigated using different wt% Pd-loaded and N-doped P-25 titanium dioxide (TiO2) nanoparticles, as example of metal and nonmetal-doped TiO2, respectively. The Pd-loaded and N-doped TiO2 photocatalysts were prepared by post-incorporation method using K2PdCl4 and urea, respectively, as precursors. A variety of surface analysis techniques were used for characterization of surface and functional group while using ultraviolet/visible (UV–vis) analysis for monitoring photocatalytic degradation of MO. Kinetic parameters were obtained using Langmuir-Hinshelwood model to determine the degradation rate constants. It was found that the metal-loaded titanium dioxide degraded MO in water at a higher rate than did non-metal-loaded titanium dioxide fabricated by using the post-synthesis method. Also, the pure P25-TiO2 degraded MO more than N-doped TiO2 because of decreased surface area by particle agglomeration after being made by the post-incorporation method. |
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| Keywords: | Methyl orange Titanium dioxide Palladium Nitrogen Langmuir-Hinshelwood kinetics |
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