Internal electric fields drive dual S-scheme heterojunctions: Insights into the role of the triple interlaced lattice.

[Display omitted] • The dual S-scheme Bi 2 O 2 CO 3 /Bi 2 WO 6 /C 3 N 4 heterojunction with interlaced lattice was constructed. • Efficient removal of ciprofloxacin was achieved in Bi 2 O 2 CO 3 /Bi 2 WO 6 /C 3 N 4 heterojunction. • The fully blossomed flower-like structure promoted light harvesting and charge transfer. • The role of the interlaced lattice interface in the charge transfer mechanism was revealed. The internal electric field induced by the lattice interfaces in a heterojunction can facilitate charge transfer, thereby improving the photocatalytic performance. However, the details of the relationship between the lattice interfaces and the charge transfer mechanism in heterojunctions remain unclear. In this study, a Bi 2 WO 6 /Bi 2 O 2 CO 3 /C 3 N 4 heterojunction (BBC) with an interlaced lattice was prepared, and the role of the interlaced lattice in charge transfer was revealed. Compared to pristine Bi 2 O 2 CO 3 , Bi 2 WO 6, and C 3 N 4 , BBC exhibited an increased ciprofloxacin degradation rate constant (0.0573 min−1). A series of experiments were performed to reveal the role of the interlaced lattice interface in the enhanced photocatalytic performance. The results show that the driving force provided by the interlaced lattice interface changes the charge transfer mechanism from a dual Ⅱ-scheme to a dual S-scheme. This work provides profound insights into the effects of lattice interfaces in heterojunctions and the design of efficient photocatalysts. [ABSTRACT FROM AUTHOR]