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PreprintCC BYChemRxiv

Contact-electro-catalytic degradation of 4-hydroxybenzoic acid using PTFE

  • Dinesh Kumar
  • Anna Šutka
  • Māris Turks
  • Andris Šutka
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Abstract

This study introduces an ultrasound-powered contact-electro-catalysis (CEC) method for degrading 4-hydroxybenzoic acid (HBA) using polytetrafluoroethylene (PTFE) microparticles. Under neutral conditions, the system achieved over 99% HBA degradation in aqueous solutions. Mechanistic analysis confirms that hydroxyl radicals act as the primary oxidants. HBA degradation proceeds via primary hydroxylation and secondary decarboxylation pathway. The effects of acidic and alkaline conditions were investigated, demonstrating the non-innocent role of counter ions. Furthermore, recycling tests showed that the PTFE catalyst retains high structural integrity and consistent degradation efficiencies (96%–99%) of HBA across consecutive cycles. These findings demonstrate the potential of ultrasound-driven CEC as a robust technology for wastewater remediation.

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Cite

BibTeXRIS
BibTeX
@misc{kumar2026contactelectrocatalytic,
  title = {{Contact-electro-catalytic degradation of 4-hydroxybenzoic acid using PTFE}},
  author = {Dinesh Kumar and Anna Šutka and Māris Turks and Andris Šutka},
  howpublished = {ChemRxiv},
  year = {2026},
  month = oct,
  doi = {10.26434/chemrxiv.15010826/v1},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010826/v1},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - Contact-electro-catalytic degradation of 4-hydroxybenzoic acid using PTFE
AU  - Dinesh Kumar
AU  - Anna Šutka
AU  - Māris Turks
AU  - Andris Šutka
PY  - 2026
DA  - 2026/10/22
PB  - ChemRxiv
DO  - 10.26434/chemrxiv.15010826/v1
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010826/v1
AB  - This study introduces an ultrasound-powered contact-electro-catalysis (CEC) method for degrading 4-hydroxybenzoic acid (HBA) using polytetrafluoroethylene (PTFE) microparticles. Under neutral conditions, the system achieved over 99% HBA degradation in aqueous solutions. Mechanistic analysis confirms that hydroxyl radicals act as the primary oxidants. HBA degradation proceeds via primary hydroxylation and secondary decarboxylation pathway. The effects of acidic and alkaline conditions were investigated, demonstrating the non-innocent role of counter ions. Furthermore, recycling tests showed that the PTFE catalyst retains high structural integrity and consistent degradation efficiencies (96%–99%) of HBA across consecutive cycles. These findings demonstrate the potential of ultrasound-driven CEC as a robust technology for wastewater remediation.
ER  -