Catalysts | |
Iron Phosphide Precatalyst for Electrocatalytic Degradation of Rhodamine B Dye and Removal of Escherichia coli from Simulated Wastewater | |
Jack S. Summers1  Plamen Stefanov2  Jelena Topić3  Manel Machreki4  Matjaz Valant4  Saim Emin4  Takwa Chouki4  Aaron Fait5  Erika Jez6  Lorena Butinar6  | |
[1] Department of Chemistry and Physics, Western Carolina University, Cullowhee, NC 28723, USA;Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;Laboratory for Environmental and Life Sciences, University of Nova Gorica, 5000 Nova Gorica, Slovenia;Materials Research Laboratory, University of Nova Gorica, 5270 Ajdovscina, Slovenia;The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 84990, Israel;Wine Research Centre, University of Nova Gorica, Glavni Trg 8, 5271 Vipava, Slovenia; | |
关键词: Fe2P-iron phosphate; electrocatalysis; rhodamine B; Escherichia coli; reactive chlorine species; | |
DOI : 10.3390/catal12030269 | |
来源: DOAJ |
【 摘 要 】
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 (Fe2P) precatalyst for electrocatalytic water oxidation; degradation of a representative aromatic hydrocarbon, the dye rhodamine B (RhB); and inactivation of Escherichia coli (E. coli) bacteria. It was found that during anodic oxidation, the Fe2P phase was converted to iron phosphate phase (Fe2P-iron phosphate). This is the first report that Fe2P precatalyst can efficiently catalyze electrooxidation of an organic molecule and inactivate microorganisms in aqueous media. Using a thin film of Fe2P precatalyst, we achieved 98% RhB degradation efficiency and 100% E. coli 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 Fe2P 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 Lepidium sativum L., EC-treated RhB solutions showed significantly diminished phytotoxicity when compared to untreated RhB. These findings suggest that Fe2P-iron phosphate electrocatalyst could be an effective water remediation agent.
【 授权许可】
Unknown