Construction of BiOBr/Bi2WO6 S‐scheme heterojunction photocatalyst for enhanced photocatalytic degradation for tetracycline removal

Abstract In this study, Bi 2 WO 6 /BiOBr S‐scheme heterojunction composites were synthesized via a one‐step solvothermal method. The experimental results demonstrate that the Bi 2 WO 6 /BiOBr composites exhibit a significant redshift in the light absorption edge and a reduction in bandgap compared with that of individual Bi 2 WO 6 and BiOBr. Meanwhile, the separation and transfer of photogenerated carriers were accelerated in Bi 2 WO 6 /BiOBr composites. In the photocatalytic degradation of tetracycline, the best composite displayed the highest photocatalytic activity, achieving a degradation efficiency of 91.3% after 60 min of light irradiation. Moreover, it maintained good stability even after four cycles. The enhancement in photocatalytic activity is primarily attributed to the formation of the S‐scheme heterojunction and the strengthened interfacial interactions.