Details

Autor(en) / Beteiligte

• Silvestri, Siara
• Ferreira, Celia Dias
• Oliveira, Verónica
• Varejão, Jorge M.T.B.
• Labrincha, João A.
• Tobaldi, David Maria

Titel

Synthesis of PPy-ZnO composite used as photocatalyst for the degradation of diclofenac under simulated solar irradiation

Ist Teil von

• Journal of photochemistry and photobiology. A, Chemistry., 2019-04, Vol.375, p.261-269

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •PPy-ZnO was synthesized via polymerization.•This is the first time that a composite PPy-ZnO was used for the PC degradation of DCF.•The PPy-ZnO demonstrated to be highly active for DCF PC degradation.•The photocatalyst showed stability and capability of reuse.•PPy-ZnO was more effective in the photodegradation of DCF than ZnO. A composite photocatalyst consisting of polypyrrole (PPy) and zinc oxide (ZnO) was successfully synthesized via a polymerization method. Different characterization techniques confirmed that ZnO was intimately attached on PPy. The photocatalytic activity of PPy-ZnO composite was studied experimentally for the degradation of diclofenac (DCF) under simulated solar light irradiation at ambient conditions. It was indicated that the photocatalytic rate constant of PPy-ZnO was nearly 2 times higher than that of ZnO. Through tests with scavengers, h+ was shown to be the main oxidative species responsible for the degradation of DCF by PPy-ZnO, resulting in 81% degradation of the molecule in merely 60 min.