BaFe12O19/BiOBr S-scheme heterojunction magnetic nanosheets for high-efficiency photocatalytic degradation of 2-mercaptobenzothiazole
Xiao-Rui Yan, Tingting Zhang, Suci Meng, Puyang Zhou, Yuanguo Xu, Yan Wang, Meng Xie
Abstract
Visible-light-driven (VLD) BaFe 12 O 19 /BiOBr composite catalysts with different mass ratios of BaFe 12 O 19 are prepared via hydrothermal and calcination method. The constructed S-type heterojunction enables BaFe 12 O 19 /BiOBr photocatalysts to perform effective space charge transfer and higher redox ability. Especially, the obtained BaFe 12 O 19 /BiOBr composites exhibited the high photocatalytic activity (95 %) to degrade 2-mercaptobenzothiazole (MBT) only after 3 min of visible light irradiation, which was much better than pure BaFe 12 O 19 (10.6 %) and BiOBr (49 %). What's more, the BaFe 12 O 19 /BiOBr composites can be separated magnetically, thus achieving the practical significance of efficient separation and recovery. Photocatalytic activity experiments demonstrated that the prepared composites also showed good photocatalytic degradation performance towards Tetracycline hydrochloride (TC), Ciprofloxacin (CIP) and Eosin. Overall, the separable BaFe 12 O 19 /BiOBr composite photocatalysts will be promising candidate materials in sewage purification.