Photo-Fenton enhanced degradation of antibiotic by Fe single-atom material: Mechanism, performance and adaptability

• Published in: Separation and purification technology 2023-04, Vol.310, p.123149, Article 123149
• Main Authors: Yu, Qinqin, Dai, Youzhi, Zhang, Zhu, Feng, Bo
• Format: Article
• Language: English
• Subjects: Enhancement mechanism; Fe single-atom catalyst; Non-homogeneous Fenton; S-scheme heterojunction; Visible light catalysis
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/j.seppur.2023.123149

[Display omitted] •A novel photo-Fenton coupled system based on Fe single atom (FeSA) was constructed.•FeSA and S-scheme heterojunction together promote visible light utilization.•The coupling system utilizes visible light to excite non-homogeneous material.•The coupling system is highly adaptable to complex water environments.•Photocatalysis and Fenton reactions synergistically promote pollutant degradation. A novel photo-Fenton coupling system was constructed in this paper to address the problems of low visible light utilization, narrow pH applicability range and difficult separation and recovery of common photo-Fenton. Fe single-atom material with high activity was used as a bridge connecting photocatalysis and Fenton oxidation, and the performance and mechanism of the coupling system were investigated using a typical antibiotic ciprofloxacin (CIP) as the target pollutant. It was found that the degradation performance of the photo-Fenton coupling system is significantly improved, and can be maintained in acidic, neutral and alkaline wastewaters; the main active species of the coupling system are ·O2–, 1O2 and h+, and the enhancement mechanism is a combination of Fe single atoms, S-scheme heterojunction and multiple active species.