A novel anode based on PbO2-GNRs nanocomposites was synthesized in order to investigate the simultaneous electrochemical oxidation of phenolic compounds in a mixture of methyl and chloro substituted phenols in alkaline solution (pH = 8.3). The crystal structure, morphology and composition of the synthesized materials were characterized using X-ray powder diffraction (XRPD), field emission scanning electron microscopy with energy dispersive X-ray spectrometer (FESEM-EDX) and transmission electron microscopy (TEM). FESEM images confirmed the presence of PbO2 nanoparticles on the PbO2-GNRs composite. The cyclic voltammetry measurements of the PbO2-GNRs electrode in 0.1 M Na2SO4 electrolyte indicated the electrochemical oxidation of phenol via indirect mechanism by hydroxyl radicals. Electrolytic oxidation of phenolic compounds was performed under potentiostatic conditions at potentials 2.3 V and 3 V. Removal efficiency of phenolic compounds increased with increasing the time of electrolys...is and applied potential, up to 78% for 300 min and potential of 3 V. GC–MS chromatograms confirmed that mechanism of phenolic compounds degradation is based on their dechlorination and demethylation followed by the process of aromatic ring degradation. Newly synthesized PbO2-GNRs as electrode material could be successfully implemented in wastewater treatment of phenolic compounds by the electrochemical oxidation process.
Кључне речи:
Base medium / Electrochemical oxidation / PbO-GNRs / Phenolic compounds / Wastewater treatment
TY - JOUR
AU - Savić, Branislava
AU - Stanković, Dalibor M.
AU - Živković, Sanja
AU - Ognjanović, Miloš
AU - Tasić, Gvozden S.
AU - Mihajlović, Ivana
AU - Brdarić, Tanja
PY - 2020
UR - https://vinar.vin.bg.ac.rs/handle/123456789/9064
AB - A novel anode based on PbO2-GNRs nanocomposites was synthesized in order to investigate the simultaneous electrochemical oxidation of phenolic compounds in a mixture of methyl and chloro substituted phenols in alkaline solution (pH = 8.3). The crystal structure, morphology and composition of the synthesized materials were characterized using X-ray powder diffraction (XRPD), field emission scanning electron microscopy with energy dispersive X-ray spectrometer (FESEM-EDX) and transmission electron microscopy (TEM). FESEM images confirmed the presence of PbO2 nanoparticles on the PbO2-GNRs composite. The cyclic voltammetry measurements of the PbO2-GNRs electrode in 0.1 M Na2SO4 electrolyte indicated the electrochemical oxidation of phenol via indirect mechanism by hydroxyl radicals. Electrolytic oxidation of phenolic compounds was performed under potentiostatic conditions at potentials 2.3 V and 3 V. Removal efficiency of phenolic compounds increased with increasing the time of electrolysis and applied potential, up to 78% for 300 min and potential of 3 V. GC–MS chromatograms confirmed that mechanism of phenolic compounds degradation is based on their dechlorination and demethylation followed by the process of aromatic ring degradation. Newly synthesized PbO2-GNRs as electrode material could be successfully implemented in wastewater treatment of phenolic compounds by the electrochemical oxidation process.
T2 - Applied Surface Science
T1 - Electrochemical oxidation of a complex mixture of phenolic compounds in the base media using PbO2-GNRs anodes
VL - 529
SP - 147120
DO - 10.1016/j.apsusc.2020.147120
ER -
@article{
author = "Savić, Branislava and Stanković, Dalibor M. and Živković, Sanja and Ognjanović, Miloš and Tasić, Gvozden S. and Mihajlović, Ivana and Brdarić, Tanja",
year = "2020",
abstract = "A novel anode based on PbO2-GNRs nanocomposites was synthesized in order to investigate the simultaneous electrochemical oxidation of phenolic compounds in a mixture of methyl and chloro substituted phenols in alkaline solution (pH = 8.3). The crystal structure, morphology and composition of the synthesized materials were characterized using X-ray powder diffraction (XRPD), field emission scanning electron microscopy with energy dispersive X-ray spectrometer (FESEM-EDX) and transmission electron microscopy (TEM). FESEM images confirmed the presence of PbO2 nanoparticles on the PbO2-GNRs composite. The cyclic voltammetry measurements of the PbO2-GNRs electrode in 0.1 M Na2SO4 electrolyte indicated the electrochemical oxidation of phenol via indirect mechanism by hydroxyl radicals. Electrolytic oxidation of phenolic compounds was performed under potentiostatic conditions at potentials 2.3 V and 3 V. Removal efficiency of phenolic compounds increased with increasing the time of electrolysis and applied potential, up to 78% for 300 min and potential of 3 V. GC–MS chromatograms confirmed that mechanism of phenolic compounds degradation is based on their dechlorination and demethylation followed by the process of aromatic ring degradation. Newly synthesized PbO2-GNRs as electrode material could be successfully implemented in wastewater treatment of phenolic compounds by the electrochemical oxidation process.",
journal = "Applied Surface Science",
title = "Electrochemical oxidation of a complex mixture of phenolic compounds in the base media using PbO2-GNRs anodes",
volume = "529",
pages = "147120",
doi = "10.1016/j.apsusc.2020.147120"
}
Savić, B., Stanković, D. M., Živković, S., Ognjanović, M., Tasić, G. S., Mihajlović, I.,& Brdarić, T.. (2020). Electrochemical oxidation of a complex mixture of phenolic compounds in the base media using PbO2-GNRs anodes. in Applied Surface Science, 529, 147120.
https://doi.org/10.1016/j.apsusc.2020.147120
Savić B, Stanković DM, Živković S, Ognjanović M, Tasić GS, Mihajlović I, Brdarić T. Electrochemical oxidation of a complex mixture of phenolic compounds in the base media using PbO2-GNRs anodes. in Applied Surface Science. 2020;529:147120.
doi:10.1016/j.apsusc.2020.147120 .
Savić, Branislava, Stanković, Dalibor M., Živković, Sanja, Ognjanović, Miloš, Tasić, Gvozden S., Mihajlović, Ivana, Brdarić, Tanja, "Electrochemical oxidation of a complex mixture of phenolic compounds in the base media using PbO2-GNRs anodes" in Applied Surface Science, 529 (2020):147120,
https://doi.org/10.1016/j.apsusc.2020.147120 . .
