Intercalation of Well‐Dispersed Fe₂O₃ with SnO₂ toward Durable Peroxymonosulfate Activation to Eliminate Antibiotics: Performance and Mechanism

Abstract

Sustainable Fe 2 O 3 /SnO 2 with fine interfacial feature derived from FeSnO(OH) 5 was prepared and employed for elimination contaminants. The synergistic effect between Fe 2 O 3 and SnO 2 endowed a remarkable degradation performance for tetracycline degradation. Well dispersed SnO 2 can function as fine protective layer to enhance the anchoring of iron ions. In addition, SnO 2 with excellent conductivity can accelerate electron transfer on the surface of Fe 2 O 3 , further activation PMS. Approximately 89.3% of tetracycline (TC) was removed in Fe 2 O 3 /SnO 2 /PMS system, which was higher than alone Fe 2 O 3 /PMS (73.2%) and SnO 2 /PMS (39.7%) systems. The operating parameters were evaluated and studied. Electron paramagnetic resonance (EPR) and quenching tests manifested that 1 O 2 was primary active specie, and * OH, * SO 4 À and * O 2 À 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.