Intercalation of Well-Dispersed Fe O with SnO toward Durable Peroxymonosulfate Activation to Eliminate Antibiotics: Performance and Mechanism.

Sustainable Fe O /SnO with fine interfacial feature derived from FeSnO(OH) was prepared and employed for elimination contaminants. The synergistic effect between Fe O and SnO endowed a remarkable degradation performance for tetracycline degradation. Well dispersed SnO can function as fine protective layer to enhance the anchoring of iron ions. In addition, SnO with excellent conductivity can accelerate electron transfer on the surface of Fe O , further activation PMS. Approximately 89.3% of tetracycline (TC) was removed in Fe O /SnO /PMS system, which was higher than alone Fe O /PMS (73.2%) and SnO /PMS (39.7%) systems. The operating parameters were evaluated and studied. Electron paramagnetic resonance (EPR) and quenching tests manifested that O was primary active specie, and ⋅OH, ⋅SO and ⋅O were participated in the degradation process. Besides, degradation pathways were proposed by identifying the intermediate products. This work is expected to offer a potential design for construction eco-friendly heterogeneous catalyst toward wastewater treatment.