Preparation of g-C3N4@bismuth dihalide oxide heterojunction membrane and its visible light catalytic performance

Heterojunction g-C3N4@BiOBr/BiOI photocatalytic membrane was prepared through electrospinning technology and hydrothermal reaction. Structural characterization confirmed that red algae-like porous graphite carbon nitride (g-C3N4) and bismuth oxyhalide (BiOX) were uniformly supported on SiO2 fibrous membrane. The g-C3N4@BiOBr/BiOI heterojunction membrane exhibits efficient photoactivity degradation of organic pollutants (drug residue) under visible light irradiation, which could remove 100% tetracycline (TC) within 120 min. The main reason for improving the performance is that the red algae-like porous g-C3N4 and BiOX form a heterojunction, which reduces the electron-hole recombination and enhances the electron-hole separation efficiency. This result has great potential in future research on the degradation of organic pollutants.