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Synthesis of PEDOT/ZnO photocatalyst: Validation of photocatalytic activity by degradation of RR45 dye

Photocatalysis is the catalytic process classified as chemical methods of waste water treatment. It can be carried out by using a photocatalyst such as ; metal oxides (TiO2, ZnO, ...). Thus, in this paper, in-situ synthesized of nanocomposite conducting polymer poly (3, 4-ethylenedioxythiophene) (PEDOT) in the presence of ZnO nanoparticles was performed. The role of the conducting polymer was to increase the photocatalytic activity by doping photocatalyst. During the synthesis of PEDOT with ammonium persulfate (APS) the ratio of monomer: oxidant (1: 2 ; 1: 3 ; 1: 5) was varied and obtained samples are denoted as PEDOT/Zn (1:2) ; PEDOT/Zn (1:3) ; PEDOT/Zn (1:5). Synthesized photocatalysts were characterized by FTIR spectrometry, XRD analysis, SEM microscopy and TG analysis. Photocatalysis is carried out under UV-A irradiation where the efficacy of azo dyes Reactive Red 45 (RR45) removal from water was followed by monitoring discoloration using UV/Vis spectroscopy. From the results of photocatalytic activity can be seen that the lowest efficiency of degradation show nanocomposite with higher concentration of PEDOT polymer.

Photocatalysis, Conducting polymers, Azo dyes, Solar irradiation

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