TiO 2 nanoparticles functionalized borneol-based polymer films with enhanced photocatalytic and antibacterial performances

Abstract Photocatalytic platforms are often used to remove pollutants from water. However, after long-term use, the surface of the platform is susceptible to the formation of bacterial biofilms, which reduces the efficiency of use and may cause secondary pollution of the water body. In this study, composite films were prepared by a casting method using a borneol-based polymer with anti-bacterial adhesion properties as a support and nano-TiO2 as a photocatalyst and bactericide. The extent of removal of methylene blue by the composite film could reach 91.5%. A remarkable anti-Staphylococcus aureus activity of the composite film under UV irradiation was observed. Additionally, the composite film was highly resistant to bacterial adhesion. These surfaces are based on the combination of two strategies into one system, which can kill bacteria as well as resisting bacterial adhesion. The multifunctional properties make the composite film suitable for applications in wastewater treatment.