Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of <i>Escherichia coli</i> from Simulated Wastewater
Electrocatalysis using low-cost materials is a promising, economical strategy for remediation of water contaminated with organic chemicals and microorganisms. Here, we report the use of iron phosphide (Fe<sub>2</sub>P) precatalyst for electrocatalytic water oxidation; degradation of a re...
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MDPI AG
2022-02-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/12/3/269 |
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| author | Takwa Chouki Manel Machreki Jelena Topić Lorena Butinar Plamen Stefanov Erika Jez Jack S. Summers Matjaz Valant Aaron Fait Saim Emin |
| author_facet | Takwa Chouki Manel Machreki Jelena Topić Lorena Butinar Plamen Stefanov Erika Jez Jack S. Summers Matjaz Valant Aaron Fait Saim Emin |
| author_sort | Takwa Chouki |
| collection | DOAJ |
| description | Electrocatalysis using low-cost materials is a promising, economical strategy for remediation of water contaminated with organic chemicals and microorganisms. Here, we report the use of iron phosphide (Fe<sub>2</sub>P) precatalyst for electrocatalytic water oxidation; degradation of a representative aromatic hydrocarbon, the dye rhodamine B (RhB); and inactivation of <i>Escherichia coli</i> (<i>E. coli</i>) bacteria. It was found that during anodic oxidation, the Fe<sub>2</sub>P phase was converted to iron phosphate phase (Fe<sub>2</sub>P-iron phosphate). This is the first report that Fe<sub>2</sub>P precatalyst can efficiently catalyze electrooxidation of an organic molecule and inactivate microorganisms in aqueous media. Using a thin film of Fe<sub>2</sub>P precatalyst, we achieved 98% RhB degradation efficiency and 100% <i>E. coli</i> inactivation under an applied bias of 2.0 V vs. reversible hydrogen electrode in the presence of in situ generated reactive chlorine species. Recycling test revealed that Fe<sub>2</sub>P precatalyst exhibits excellent activity and reproducibility during degradation of RhB. High-performance liquid chromatography with UV-Vis detection further confirmed the electrocatalytic (EC) degradation of the dye. Finally, in tests using <i>Lepidium sativum</i> L., EC-treated RhB solutions showed significantly diminished phytotoxicity when compared to untreated RhB. These findings suggest that Fe<sub>2</sub>P-iron phosphate electrocatalyst could be an effective water remediation agent. |
| first_indexed | 2024-03-09T20:02:19Z |
| format | Article |
| id | doaj.art-db8b9e99978846d782ded80d15905c16 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T20:02:19Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-db8b9e99978846d782ded80d15905c162023-11-24T00:42:06ZengMDPI AGCatalysts2073-43442022-02-0112326910.3390/catal12030269Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of <i>Escherichia coli</i> from Simulated WastewaterTakwa Chouki0Manel Machreki1Jelena Topić2Lorena Butinar3Plamen Stefanov4Erika Jez5Jack S. Summers6Matjaz Valant7Aaron Fait8Saim Emin9Materials Research Laboratory, University of Nova Gorica, 5270 Ajdovscina, SloveniaMaterials Research Laboratory, University of Nova Gorica, 5270 Ajdovscina, SloveniaLaboratory for Environmental and Life Sciences, University of Nova Gorica, 5000 Nova Gorica, SloveniaWine Research Centre, University of Nova Gorica, Glavni Trg 8, 5271 Vipava, SloveniaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaWine Research Centre, University of Nova Gorica, Glavni Trg 8, 5271 Vipava, SloveniaDepartment of Chemistry and Physics, Western Carolina University, Cullowhee, NC 28723, USAMaterials Research Laboratory, University of Nova Gorica, 5270 Ajdovscina, SloveniaThe Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, IsraelMaterials Research Laboratory, University of Nova Gorica, 5270 Ajdovscina, SloveniaElectrocatalysis using low-cost materials is a promising, economical strategy for remediation of water contaminated with organic chemicals and microorganisms. Here, we report the use of iron phosphide (Fe<sub>2</sub>P) precatalyst for electrocatalytic water oxidation; degradation of a representative aromatic hydrocarbon, the dye rhodamine B (RhB); and inactivation of <i>Escherichia coli</i> (<i>E. coli</i>) bacteria. It was found that during anodic oxidation, the Fe<sub>2</sub>P phase was converted to iron phosphate phase (Fe<sub>2</sub>P-iron phosphate). This is the first report that Fe<sub>2</sub>P precatalyst can efficiently catalyze electrooxidation of an organic molecule and inactivate microorganisms in aqueous media. Using a thin film of Fe<sub>2</sub>P precatalyst, we achieved 98% RhB degradation efficiency and 100% <i>E. coli</i> inactivation under an applied bias of 2.0 V vs. reversible hydrogen electrode in the presence of in situ generated reactive chlorine species. Recycling test revealed that Fe<sub>2</sub>P precatalyst exhibits excellent activity and reproducibility during degradation of RhB. High-performance liquid chromatography with UV-Vis detection further confirmed the electrocatalytic (EC) degradation of the dye. Finally, in tests using <i>Lepidium sativum</i> L., EC-treated RhB solutions showed significantly diminished phytotoxicity when compared to untreated RhB. These findings suggest that Fe<sub>2</sub>P-iron phosphate electrocatalyst could be an effective water remediation agent.https://www.mdpi.com/2073-4344/12/3/269Fe<sub>2</sub>P-iron phosphateelectrocatalysisrhodamine B<i>Escherichia coli</i>reactive chlorine species |
| spellingShingle | Takwa Chouki Manel Machreki Jelena Topić Lorena Butinar Plamen Stefanov Erika Jez Jack S. Summers Matjaz Valant Aaron Fait Saim Emin Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of <i>Escherichia coli</i> from Simulated Wastewater Catalysts Fe<sub>2</sub>P-iron phosphate electrocatalysis rhodamine B <i>Escherichia coli</i> reactive chlorine species |
| title | Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of <i>Escherichia coli</i> from Simulated Wastewater |
| title_full | Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of <i>Escherichia coli</i> from Simulated Wastewater |
| title_fullStr | Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of <i>Escherichia coli</i> from Simulated Wastewater |
| title_full_unstemmed | Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of <i>Escherichia coli</i> from Simulated Wastewater |
| title_short | Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of <i>Escherichia coli</i> from Simulated Wastewater |
| title_sort | iron phosphide precatalyst for electrocatalytic degradation of rhodamine b dye and removal of i escherichia coli i from simulated wastewater |
| topic | Fe<sub>2</sub>P-iron phosphate electrocatalysis rhodamine B <i>Escherichia coli</i> reactive chlorine species |
| url | https://www.mdpi.com/2073-4344/12/3/269 |
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