Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants?
This paper presents a comparative analysis of three carbon-based electrodes: bare multiwalled carbon nanotubes (MWCNT), SnO<sub>2</sub>/MWCNT, and PbO<sub>2</sub>/graphene-nanoribbons (PbO<sub>2</sub>/GNR) composites, as anodes for the electrooxidative degradation...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/16/5203 |
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| author | Marija Ječmenica Dučić Danka Aćimović Branislava Savić Lazar Rakočević Marija Simić Tanja Brdarić Dragana Vasić Anićijević |
| author_facet | Marija Ječmenica Dučić Danka Aćimović Branislava Savić Lazar Rakočević Marija Simić Tanja Brdarić Dragana Vasić Anićijević |
| author_sort | Marija Ječmenica Dučić |
| collection | DOAJ |
| description | This paper presents a comparative analysis of three carbon-based electrodes: bare multiwalled carbon nanotubes (MWCNT), SnO<sub>2</sub>/MWCNT, and PbO<sub>2</sub>/graphene-nanoribbons (PbO<sub>2</sub>/GNR) composites, as anodes for the electrooxidative degradation of Rhodamine B as a model organic pollutant. Anodic electrooxidation of Rhodamine B was performed on all three electrodes, and the decolorization efficiency was found to increase in the order MWCNT < PbO<sub>2</sub>/GNR < SnO<sub>2</sub>/MWCNT. The electrodes were characterized by X-ray photoelectron spectroscopy (XPS) and linear sweep voltammetry (LSV). It was proposed that, in the 0.1 M Na<sub>2</sub>SO<sub>4</sub> applied as electrolyte, observed decolorization mainly occurs in the interaction of Rhodamine B with OH radical adsorbed on the anode. Finally, the obtained results were complemented with Density Functional Theory (DFT) calculations of OH-radical interaction with appropriate model surfaces: graphene(0001), SnO<sub>2</sub>(001), and PbO<sub>2</sub>(001). It was found that the stabilization of adsorbed OH-radical on metal oxide spots (SnO<sub>2</sub> or PbO<sub>2</sub>) compared to carbon is responsible for the improved efficiency of composites in the degradation of Rhodamine B. The observed ability of metal oxides to improve the electrooxidative potential of carbon towards organic compounds can be useful in the future design of appropriate anodes. |
| first_indexed | 2024-03-09T09:51:57Z |
| format | Article |
| id | doaj.art-74e193992e2f483b8e1e08545396df47 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T09:51:57Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-74e193992e2f483b8e1e08545396df472023-12-02T00:04:33ZengMDPI AGMolecules1420-30492022-08-012716520310.3390/molecules27165203Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants?Marija Ječmenica Dučić0Danka Aćimović1Branislava Savić2Lazar Rakočević3Marija Simić4Tanja Brdarić5Dragana Vasić Anićijević6University of Belgrade, Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, Department of Physical Chemistry, Mike Petrovića Alasa 12-14, 11001 Belgrade, SerbiaUniversity of Belgrade, Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, Department of Physical Chemistry, Mike Petrovića Alasa 12-14, 11001 Belgrade, SerbiaUniversity of Belgrade, Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, Department of Physical Chemistry, Mike Petrovića Alasa 12-14, 11001 Belgrade, SerbiaUniversity of Belgrade, Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, Department of Atomics Physics, Mike Petrovića Alasa 12-14, 11001 Belgrade, SerbiaUniversity of Belgrade, Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, Department of Physical Chemistry, Mike Petrovića Alasa 12-14, 11001 Belgrade, SerbiaUniversity of Belgrade, Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, Department of Physical Chemistry, Mike Petrovića Alasa 12-14, 11001 Belgrade, SerbiaUniversity of Belgrade, Vinča Institute of Nuclear Sciences-National Institute of the Republic of Serbia, Department of Physical Chemistry, Mike Petrovića Alasa 12-14, 11001 Belgrade, SerbiaThis paper presents a comparative analysis of three carbon-based electrodes: bare multiwalled carbon nanotubes (MWCNT), SnO<sub>2</sub>/MWCNT, and PbO<sub>2</sub>/graphene-nanoribbons (PbO<sub>2</sub>/GNR) composites, as anodes for the electrooxidative degradation of Rhodamine B as a model organic pollutant. Anodic electrooxidation of Rhodamine B was performed on all three electrodes, and the decolorization efficiency was found to increase in the order MWCNT < PbO<sub>2</sub>/GNR < SnO<sub>2</sub>/MWCNT. The electrodes were characterized by X-ray photoelectron spectroscopy (XPS) and linear sweep voltammetry (LSV). It was proposed that, in the 0.1 M Na<sub>2</sub>SO<sub>4</sub> applied as electrolyte, observed decolorization mainly occurs in the interaction of Rhodamine B with OH radical adsorbed on the anode. Finally, the obtained results were complemented with Density Functional Theory (DFT) calculations of OH-radical interaction with appropriate model surfaces: graphene(0001), SnO<sub>2</sub>(001), and PbO<sub>2</sub>(001). It was found that the stabilization of adsorbed OH-radical on metal oxide spots (SnO<sub>2</sub> or PbO<sub>2</sub>) compared to carbon is responsible for the improved efficiency of composites in the degradation of Rhodamine B. The observed ability of metal oxides to improve the electrooxidative potential of carbon towards organic compounds can be useful in the future design of appropriate anodes.https://www.mdpi.com/1420-3049/27/16/5203carbongrapheneDFT calculationsorganic pollutantselectrochemical oxidationnanocomposite anodes |
| spellingShingle | Marija Ječmenica Dučić Danka Aćimović Branislava Savić Lazar Rakočević Marija Simić Tanja Brdarić Dragana Vasić Anićijević Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants? Molecules carbon graphene DFT calculations organic pollutants electrochemical oxidation nanocomposite anodes |
| title | Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants? |
| title_full | Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants? |
| title_fullStr | Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants? |
| title_full_unstemmed | Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants? |
| title_short | Is It Possible to Restrain OER on Simple Carbon Electrodes to Efficiently Electrooxidize Organic Pollutants? |
| title_sort | is it possible to restrain oer on simple carbon electrodes to efficiently electrooxidize organic pollutants |
| topic | carbon graphene DFT calculations organic pollutants electrochemical oxidation nanocomposite anodes |
| url | https://www.mdpi.com/1420-3049/27/16/5203 |
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