Enhanced photocatalytic degradation and antibacterial performance by GO/CN/BiOI composites under LED light

GO/CN/BiOI composites were obtained by in-situ generation route and investigated in photocatalytic degradation and antibacterial. Detailed analysis of the photocatalyst was presented by XRD, TEM, SEM, XPS, FT-IR, Raman, DRS, photocurrent, EIS and LSCM. The synthesized GO/CN/BiOI composites showed good photocatalytic degradation and excellent antibacterial performance under LED light. The optimal composite could degrade 93% methyl orange (MO) in 60 min and 74% tetracycline (TC) in 100 min. In terms of antibacterial, GO/CN/BiOI composites could completely inactivated E. coli and S. aureus within 30 min. The mechanism of photocatalytic degradation and antibacterial activity was studied by trapping experiments, and h+ played an important role in the system. The improved photo-performance was attributed to the efficient separation of electrons (e−) and holes (h+) in the composite. This work showed the GO/CN/BiOI composite is a potential photocatalyst in pollution removing and water disinfection.