Bi3O4Br/Ti3C2 Schottky junction with enhanced active species generation for boosting visible-light photodegradation bisphenol A activity.

• Bi 3 O 4 Br/Ti 3 C 2 Schottky junction with efficient charge transfer was prepared. • The effect of charge transfer on active species generation was discussed. • The Bi 3 O 4 Br/Ti 3 C 2 exhibited excellent photocatalytic degradation activity of bisphenol A. Enhanced photocatalytic active species generation is an important strategy for tuning its visible-light photocatalytic activity, which is highly related to the separation and transfer of photogenerated charge carriers. In this study, we successfully prepared a novel Bi 3 O 4 Br/Ti 3 C 2 two-dimensional/two-dimensional (2D/2D) Schottky junction with special interfacial charge transfer channel via in-situ growth of Bi 3 O 4 Br on the surface of ultrathin Ti 3 C 2. The relevant characterization results indicated that Bi 3 O 4 Br/Ti 3 C 2 had a stable structure and tight interface binding, which shortened the distance of charge transfer, promoted the separation of photogenerated electron-hole pairs, and then enhanced the generation of active species. Therefore, the optimized photodegradation activity and TOC removal efficiency of Bi 3 O 4 Br/Ti 3 C 2 on Bisphenol A (BPA) could reach 91.26% and 70.97% within 60 min visible-light irradiation, respectively. Furthermore, intermediate products and BPA degradation pathways were determined. This work provides a new protocol for the construction of 2D/2D heterojunction photocatalytic systems and regulating photocatalytic active species generation by electronic effective transporting. [ABSTRACT FROM AUTHOR]