Electrochemical oxidation of a complex mixture of phenolic compounds in the base media using PbO2-GNRs anodes
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2020
Authors
Savić, Branislava G.Stanković, Dalibor
Živković, Sanja
Ognjanović, Miloš
Tasić, Gvozden S.
Mihajlović, Ivana J.
Brdarić, Tanja P.
Article (Published version)
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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.
Keywords:
Base medium / Electrochemical oxidation / PbO-GNRs / Phenolic compounds / Wastewater treatmentSource:
Applied Surface Science, 2020, 529, 147120-Publisher:
- Elsevier
Funding / projects:
- Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja - Eureka project E!13303 MED-BIO-TEST
Note:
- Supplementary material: https://cherry.chem.bg.ac.rs/handle/123456789/4207
DOI: 10.1016/j.apsusc.2020.147120
ISSN: 0169-4332
WoS: 000564391700008
Scopus: 2-s2.0-85087334810
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Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Savić, Branislava G. AU - Stanković, Dalibor AU - Živković, Sanja AU - Ognjanović, Miloš AU - Tasić, Gvozden S. AU - Mihajlović, Ivana J. AU - Brdarić, Tanja P. PY - 2020 UR - https://cherry.chem.bg.ac.rs/handle/123456789/4177 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. PB - Elsevier 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 G. and Stanković, Dalibor and Živković, Sanja and Ognjanović, Miloš and Tasić, Gvozden S. and Mihajlović, Ivana J. and Brdarić, Tanja P.", 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.", publisher = "Elsevier", 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. G., Stanković, D., Živković, S., Ognjanović, M., Tasić, G. S., Mihajlović, I. J.,& Brdarić, T. P.. (2020). Electrochemical oxidation of a complex mixture of phenolic compounds in the base media using PbO2-GNRs anodes. in Applied Surface Science Elsevier., 529, 147120. https://doi.org/10.1016/j.apsusc.2020.147120
Savić BG, Stanković D, Živković S, Ognjanović M, Tasić GS, Mihajlović IJ, Brdarić TP. 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 G., Stanković, Dalibor, Živković, Sanja, Ognjanović, Miloš, Tasić, Gvozden S., Mihajlović, Ivana J., Brdarić, Tanja P., "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 . .