Browsing by Author "BELHAJ, Fatma Saad Mohamed"
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thesis.listelement.badge PREPARATION AND INVESTIGATION OF PHOTOCATALYTIC ACTIVITY OF SILVER NANOPARTICLE ADDED MAGNETIC-PEDOT NANOCOMPOSITE MATERIAL(2022-02-24) BELHAJ, Fatma Saad Mohamed; KAYA, MuratRemoval of toxic organic materials discarded with textile waste waters to surrounding area is of great importance for environmental remediation. Among these methods, advanced oxidation process (AOP), which enables the degradation of organic pollutants by oxidation, has attracted great interest in recent years. In this method, it is aimed to remove organic pollutants by means of light and catalyst. Semiconductor TiO2 and ZnO nanoparticles are usually used as catalysts in such processes. However, the difficulties in separating nanoscale particles at the end of the process make it necessary to develop new approaches. For this reason, the production of materials which are more efficient and easy to produce and allow the catalyst to be used again is of great importance. In this direction conductive polymers are very interesting materials because of their easy production and high photocatalytic activity potential. It is also seen as a suitable material for magnetic separation, which can be an alternative to expensive, laborious, and difficult to apply large volumes of pollutants such as filtration and centrifugation. The aim of this work is to produce more active photocatalysts than semi-conductor base catalysts under UV light with magnetic properties. In this direction, PEDOT based nanocomposite material (SiO2-CoFe2O4/PEDOT-AgNPs) is prepared as a conductive polymer containing magnetic cobalt ferrite (SiO2-CoFe2O4) and silver nanoparticles (AgNPs). The activity of the obtained nanocomposite material was investigated in the removal of methylene blue known as a model dye contaminant under UV irradiation. In addition, the catalytic activities of the TiO2 nanoparticle, PEDOT and SiO2-CoFe2O4/PEDOT structures were also investigated to demonstrate the increase in catalytic activity systematically. Detailed characterizations of the prepared particles were performed with high resolution transmission electron microscopy (HR-TEM), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and inductively coupled plasma optical emission spectrometry (ICP-OES). With the results obtained, it has been proved that the new material prepared is more efficient than the semiconductor based catalysts. The added magnetic property allows the catalyst to be separated from the medium without the need for complex separation methods.