In situ synthesis of FeOCl@MoS2 on graphite felt as novel electro-Fenton cathode for efficient degradation of antibiotic ciprofloxacin at mild pH

The traditional Electro-Fenton (EF) is an efficient technology for wastewater treatment but suffers from the acidic condition requirement and external catalyst addition. To overcome these challenges, a GF@MoS2@FeOCl cathode was fabricated using a facile method. The as-prepared GF@MoS2@FeOCl cathode showed excellent performance for ciprofloxacin (CIP) degradation in EF process with RuO2/Ti electrode as the anode. H2O2 was electro-generated and activated on-site at the cathode at mild pH without adding Fe2+. CIP was 100% removed with 74.4% of mineralization in 90 min at pH 6. The GF@MoS2@FeOCl cathode exhibited good reusability after consecutive runs of degradation. The degradation intermediates were investigated, and the possible mechanism was proposed. This work demonstrated that the prepared GF@MoS2@FeOCl cathode is a promising candidate for contaminants treatment in an EF system. (C) 2021 Elsevier Ltd. All rights reserved.

Automated summary

This study improved the traditional EF wastewater treatment technology by preparing GF@MoS2@FeOCl cathode, and the experimental results showed that the cathode had good degradation performance and reusability, providing a potential solution for wastewater treatment.