An efficient system for electro-Fenton oxidation of pesticide by a reduced graphene oxide-aminopyrazine@3DNi foam gas diffusion electrode
- Title
- An efficient system for electro-Fenton oxidation of pesticide by a reduced graphene oxide-aminopyrazine@3DNi foam gas diffusion electrode
- Author
- 권일한
- Keywords
- Gas-diffusion electrode; Aminopyrazine functionalized graphene oxide; 3D nickel foam; Electro-Fenton process; Dichlorvos; Coated Fe3O4 plate
- Issue Date
- 2020-12
- Publisher
- ELSEVIER
- Citation
- JOURNAL OF HAZARDOUS MATERIALS, v. 400, article no. 123323
- Abstract
- A stable rGO-AmPyraz@3DNiF gas diffusion electrode was prepared via modification of 3D nickel foam (3D-NiF) with aminopyrazine functionalized reduced graphene oxide (rGO-AmPyraz) for the electro Fenton (EF) process. The generation capacity of H2O2 and OH radicals by this electrode was assessed relative to 3DNiF and rGO-AmPyraz@indium tin oxide (ITO) electrodes and with/without a coated Fe3O4 plate. The rGO-AmPyraz@3DNiF electrode showed the maximum production of these radicals at 2.2 mmol h−1 and 410 μmol h−1, respectively (pH 3) with the least leaching of Ni2+ such as < 0.5 mg L−1 even after 5 cycles (e.g., relative to 3DNiF (24 mg L−1). Such control on Ni ion leaching was effective all across the tested pH from 3 to 8.5. Its H2O2 generation capacity was far higher than that of the nanocarbon supported on commercially available ITO conductive glass. The mineralization of dichlorvos (at initial concentration: 50 mg L−1) was confirmed with its complete degradation as the concentrations of the end products (e.g., free Cl−1 (5.36 mg L−1) and phosphate (12.89 mg L−1)) were in good agreement with their stoichiometric concentration in dichlorvos. As such, the proposed system can be recommended as an effective electrode to replace nanocarbon-based product commonly employed for EF processes.
- URI
- https://www.sciencedirect.com/science/article/pii/S0304389420313121?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/172969
- ISSN
- 0304-3894; 1873-3336
- DOI
- 10.1016/j.jhazmat.2020.123323
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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