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Synthesis of TiO2-Graphene composites for the photocatalytic degradation of organic pollutants in the aqueous phase

Bertakis Ioannis

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Summary

The main topic of this Thesis is the creation of the graphite oxide, the synthesis of complex solid catalysts and their application in the process of degradation of organic pollutants. The major components of these catalysts are titanium isopropoxide (TIP,) which is a precursor of TiO2, and the graphene oxide (GO). The first step of this work was the design of the experiments, the construction of the irradiation chamber and the operation of the equipment would be used.Second step was the configuration of devices and appliances. The parameters which were changed, that means a long range and number of experiments. The parameters was: the time, temperature, pH, the solvents, the concentration of graphene, Titanium dioxide and organic pollutants.The configuration of the stractures specifically made in two procedures:First Process: Synthesis Catalysts using hydrothermal ReactorThe synthesis process focused on those variables of the system to achieve optimal reduction of graphene oxide and coupling it with the TIP. These variables were the reaction time, pH, temperature, the solvent that used and the concentration of graphene and titanium.Second Process: Degradation of Organic PollutantsIn the degradation process of organic pollutants, having achieved the synthesis of the optimal catalyst through the previous process, the aim was to achieve optimal absorption of the pollutant and faster degradation under UV irradiation, changing the irradiation time and the relevant pollutants. The solvent was water which remained constant for all experiments.

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