Synthesis of TiO2 Nanoparticles Modified by Several Transition Metals and Investigation of their Effects on Degradation Kinetics of Dye

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Kaboli, Zeynab | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40078 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Gholami, Mohammad Reza
Abstract:
In this project, TiO2 nanoparticles were prepared by the sol gel method. The band gap of TiO2 was modified with transition metal ions Pt, Pd, Ni. The kinetics and photocatalytic degradation of AB92 investigated. The effect of some parameters such as pH and amount of photocatalysis and calcination tempreture were examined. Also effect of transition metal increase on surface morphology and photocatalytic activity were investigated by XRD, BET, SEM, DRS and FT-IR Techniques. Dyes are an abundant class of colored organic compounds that represent and increasing environmental danger. Azo dyes are well-known carcinogenic organic substances. Advanced oxidation processes (AOPs) have been proposed as alternative routes for water purification. AOPs were based on the generation of very reactive species such as hydroxyl radicals (OH°) that oxidize a broad range of pollutants quickly and nonselectivity. Among AOPs heterogeneous photocatalysis are the most emerging destructive Technology. Experimental results indicate that the decholorization rate increased constantly in the system when the amount of pH ranged at 2-3 and at 500ºC has the best photocatalytic activity.
Keywords:
Titanium Dioxide ; Photocatalyst ; Sol-Gel Method ; Platinum ; Nickel ; Palladium ; Acid-Blue 92

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