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Preparation of Nanocomposite Materials For Photocatalytic Water Treatment

Oluşturulma Tarihi: 02-11-2017

Niteleme Bilgileri

Tür: Tez

Alt Tür: Yüksek Lisans Tezi

Yayınlanma Durumu: Yayınlanmamış

Dosya Biçimi: PDF

Dil: İngilizce

Konu(lar): Kimya mühendisliği,

Yazar(lar): Salihi, Nawar Razzaq Kadhim (Yazar),

Emeği Geçen(ler): Karakaya, Murat (Danışman),

Anahtar Kelimeler

Photocatalyst, ZnO nanoparticles, PEDOT, magnetic separation, wastewater treatment


Özet

One of the crucial concerns is water resources and its related troubles have gainedimportance due to continuous pollution of ecological water systems. Nowadays,researchers are interested in the improved techniques that can provide thedegradation of organic pollutants by oxidation. Consequently, semiconductorphotocatalysis technology has prompted scientists to provide environmentalremediation. Recently, within the semiconductor photocatalysts, especially ZnO hasgained attention because of usage in the removal of industry based wastes in air andwater. This photocatalyst can be used as treatment method because of properqualities such as being low-cost, environmentally friendly, and sustainability.Besides ZnO, there are a number of semiconductors that can be utilized for waterpollution treatment; however, effective separation, recycling and dispersion are stillimportant challenge for these tiny powdered photocatalyst. Magnetic propertyprovides magnetic separation effectively and simply for removal of suspendedcatalyst particles from waste water without using any further separation techniques.The magnetic property also provides the suspension of photocatalyst that allowsgreat surface area for catalytic reactions.

In this study, to obtain photocatalyst with high activity and well-separation quality,a facile procedure to fabricate magnetic cobalt ferrite (SiO2-CoFe2O4)and zincoxide (ZnO) added PEDOT (SiO2-CoFe2O4/PEDOT/ZnO) a novel magneticallyrecyclable nanocomposite material as a photocatalyst was demonstrated. Scanningelectron microscopy (SEM), transmission electron microscopy (TEM), highresolution- transmission electron microscopy (HR-TEM) and energy dispersive XRay(EDX) were utilized for the characterization of nanocomposite photocatalysts.The photocatalytic activity of SiO2-CoFe2O4/PEDOT/ZnO nanocomposite materialwas tested into the decolorisation of methylene blue (MB) under UV lightirradiation. The photocatalytic activity of ZnO, PEDOT and ZnO/PEDOT was alsoshown to check the improvement compared to the final structure.Consequently, the usage of PEDOT and the interaction of ZnO with this polymersynergetically improve the photocatalytic activity. In addition to high activity of thephotocatalyst, the synthesized SiO2-CoFe2O4/PEDOT/ZnO nanocomposite materialhas magnetic property as an advantage. PEDOT provides not only the improvedactivity of photocatalysis but also supplementation of magnetic nanoparticles thatbrings magnetic quality to the ultimate structure.


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