Synthesis of PPy-ZnO composite used as photocatalyst for the degradation of diclofenac under simulated solar irradiation
authors Silvestri, S; Ferreira, CD; Oliveira, V; Varejao, JMTB; Labrincha, JA; Tobaldi, DM
nationality International
journal JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
author keywords Diclofenac; PPy-ZnO; Photocatalyst; Solar chamber
keywords ADVANCED OXIDATION PROCESSES; POLYPYRROLE/TIO2 NANOCOMPOSITES; WASTE-WATER; TIO2; PERFORMANCE; FABRICATION; ADSORPTION; MECHANISM; REMOVAL; DIOXIDE
abstract 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 photo catalytic 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.
publisher ELSEVIER SCIENCE SA
issn 1010-6030
year published 2019
volume 375
beginning page 261
ending page 269
digital object identifier (doi) 10.1016/j.jphotochem.2019.02.034
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000464087000031
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