Boron-doped diamond nanofilm on a Ti substrate possessing fast charge transfer: Strategy toward cost-effective electrochemical oxidation of refractory organic pollutants

Sungwoo Park, Eun Tae Yun, Hyun Jung Shin, Jaemin Choi, Jaesang Lee, Dong Wan Kim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This study suggests a breakthrough toward the high-cost issue of electrochemical degradation of refractory organic pollutants caused by adopting a boron-doped diamond (BDD) electrode. Specifically, effect of charge transfer capability of the BDD electrode on electrochemical oxidation of 4-chlorophenol (4-CP) and perfluorooctanoic acid (PFOA) is explored. Thin BDD nanofilm (thickness of ~400 nm) on a Ti substrate (BDD@Ti) was prepared to overcome the delamination of the BDD on the Ti via hot-filament chemical vapor deposition under optimum conditions. When compared with a commercial electrode (C-BDD, micron BDD film on a Nb substrate), inevitable metal-carbide layer formed at interface between BDD film and metal substrate is much thinner than that of C-BDD. The unique structural features of BDD@Ti facilitate a much faster charge transfer and degradation of both 4-CP and PFOA than C-BDD, which is attributed to shortening of electron pathway from surface to conductive substrate.

Original languageEnglish
Article number103670
JournalJournal of Water Process Engineering
Volume53
DOIs
Publication statusPublished - 2023 Jul

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2020R1A6A1A03045059 ). We thank the Korea Basic Science Institute for the technical support.

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (NRF-2020R1A6A1A03045059). We thank the Korea Basic Science Institute for the technical support.

Publisher Copyright:
© 2023

Keywords

  • Boron doped diamond
  • Charge transfer resistance
  • Electrochemical oxidation
  • Refractory organic pollutant
  • Thin film

ASJC Scopus subject areas

  • Biotechnology
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Process Chemistry and Technology

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