期刊
ENVIRONMENTAL SCIENCE-NANO
卷 9, 期 5, 页码 1662-1674出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1en01188j
关键词
-
资金
- National Research Foundation of Korea - Ministry of Science, ICT, and Future Planning [2016M3A7B4909318]
In this study, a nitrogen-doped graphene film was successfully fabricated and demonstrated superior electrical conductivity and treatment efficiency in oxidative organic degradation and persulfate conversion reactions. Furthermore, the graphene film also showed a dual role as a carbon catalyst and cathode.
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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