Degradation and mineralization of erythromycin by heterogeneous photocatalysis using SnO2-doped TiO2 structured catalysts: Activity and stability

Heterogeneous photocatalysis was used for the degradation and mineralization of erythromycin (ERY), with a consequent production carboxylic acids. For that, series TiO2 Ti1-xSnxO2 structured catalysts, namely M1 to M5, prepared using washcoating method, catalytic coatings being deposited onto stainless steel meshes. Besides, activity systems compared that commercial mesh (CM). The results showed catalyst (M1) presented better ERY oxidation than CM one, what associated higher load anatase/rutile ratio. Considering Sn-doped M2, M4 M5 lower high formation acids were found, when M3 catalyst. improved attributed staggered gap (type II heterojunction), providing charge separation. In this situation, generation hydroxyl radicals is obtained, resulting on mineralization. By obtained it possible determine addition order type Sn compound added in process, affects due solid solution produced heterostructures. also stability long-term tests up 44 h reaction. provide insights into development an inexpensive method its influence photocatalyst, as well applicability water/wastewater treatment.