Naslov
Synthesis of Pedot/ZnO photocatalyst: Validation of photocatalytic activity by degradation of AZO RR45 dye under solar and UV- A irradiation

Autori
Katančić, Zvonimir ; Šuka, Sniježana ; Vrbat, Katarina ; Tašić, Aleksandar, Hrnjak-Murgić, Zlata

Izvornik
Chemical and biochemical engeenering quartely (0352-9568) 31 (2017), 4; 385-394

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
azo dye, conductive polymers, photocatalysis, poly(3, 4-ethylenedioxythiophene), simulated solar irradiation, zinc oxide

Sažetak
To study photocatalytic efficiency of wastewater treatment processes the nanocomposites of conducting polymer poly(3, 4- ethylenedioxythiophene) (PEDOT) and ZnO nanoparticles were prepared by in-situ synthesis. ZnO is excellent photocatalyst under UV light but due to high band gap, photons of visible light have insufficient energy to excite electrons from valence to conductive band, which limits its activity under visible light and therefore practical usage is limited. The PEDOT conductive polymer was used to increase the photocatalytic activity of ZnO as conductive polymers are known as efficient electron donor and good electron transporters upon visible-light excitation. Polymerization of pure PEDOT and PEDOT/ZnO nanocomposites was carried out at varying monomer:oxidant ratio (1:2 ; 1:3 ; 1:5) with the ammonium persulfate (APS) used as the oxidant. Samples were characterized by FTIR spectroscopy, XRD analysis, SEM microscopy, UV-Vis spectroscopy and TG analysis. Photocatalytic activity was assessed through removal of C.I. Reactive Red 45 (RR45) under simulated Solar and UV-A irradiation. Photocatalysis was monitored by measuring discoloration of RR45 using UV/Vis spectroscopy. The results indicate that very low concentration of PEDOT conductive polymer in PEDOT/ZnO nanocomposite can significantly contribute to efficiency of the photocatalytic process during the wastewater treatment.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti, Interdisciplinarne tehničke znanosti

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