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

Graphical A sustainable Fe 2 O 3 /SnO 2 composite with fine interfacial feature was prepared and employed for durable peroxymonosulfate activation to eliminate tetracycline. Fe 2 O 3 /SnO 2 displayed the excellent stability and degradation performance due to the synergistic effect between Fe 2 O 3 and SnO 2 . 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 − and ⋅O 2 − 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.