Dual role of N-doped graphene film as a cathode material for anodic organic oxidation and persulfate production and as a planar carbocatalyst for non-electrochemical persulfate activation
- Authors
- Yun, Eun-Tae; Lee, Woonghee; Ahn, Yong-Yoon; Choi, Jaemin; Fortner, John D.; Cho, Kangwoo; Hong, Seungkwan; Lee, Jaesang
- Issue Date
- 19-May-2022
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENVIRONMENTAL SCIENCE-NANO, v.9, no.5, pp.1662 - 1674
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENVIRONMENTAL SCIENCE-NANO
- Volume
- 9
- Number
- 5
- Start Page
- 1662
- End Page
- 1674
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/141726
- DOI
- 10.1039/d1en01188j
- ISSN
- 2051-8153
- Abstract
- In this study, a large-area N-doped graphene film (NG/NF) was fabricated on a nickel foam (NF) substrate via thermal chemical vapor deposition along with the flow of gaseous C2H4/NH3 mixtures. It was demonstrated to enable the sequential process of anodic organic oxidation followed by non-electrochemical activation of anodically formed persulfate. NG-20/NF exhibited the highest electrical conductivity owing to the presence of a pyridinic-N dopant. It thus substantially outperformed the undoped graphene film (G/NF) and NF in initiating anodic oxidation reactions, that is, oxidative organic degradation and conversion of SO42- into persulfate. NG-20/NF performed non-radical persulfate activation, achieving constant treatment efficiency, regardless of whether electric current was applied. A marginal reduction in treatment performance occurred in the electrochemical system using NG/NF during recurring cycles of separate switch-on and -off periods. Accordingly, the dual role of NG/NF as the cathode in paired redox reactions and as the carbocatalyst in persulfate activation was shown.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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