engleski

New Photocatalytic Nanocomposites in Water Purification

The water resources globally are facing tremendous pressures due to increased consumption and pollution caused by growing population and industrialization. Thus, the development of novel advanced treatment technologies is highly required. Technologies using nanomaterials are one of the fast-growing fields creating variety of new commercial nanoparticles. One of the innovative applications of nanomaterials with a great potential involve their usage as water/wastewater treatment tools. Titanium dioxide is one of the most important photocatalyst, which is widely used due to its chemical stability and high photocatalytic activity. However, relatively high recombination rate of electron-hole pair in excited. TiO2 restricts its photocatalytic activity thus hindering its practical application in the water treatment processes. Conducting polymers as poly(3, 4- ethylenedioxythiophene) (PEDOT) with extended π-conjugated electron system and satisfactory environmental stability can act as stable photosensitizer to sensitize TiO under solar light irradiation. The objective was to synthesize PEDOT-TiO2 based photocatalysts and to investigate photocatalytic activities under UV/Visible and solar light irradiation using simulated wastewater containing organic azo dye C.I. Reactive Red 45 (RR45) as water pollutant to determine the degradation efficiency in terms of decolorization, total organic carbon (TOC) removal and toxicity tests. Photocatalysts were synthesized by oxidative chemical polymerization with two different oxidants, FeCl3 and (NH4)2S2O8 at different polymerization conditions (time and temperature) and characterized by SEM, FTIR and TGA analyses

azo dye ; AOPS ; fly ash ; photocatalysis ; titanium dioxide,

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