Antibacterial photocatalytic films for effective degradation of organic compounds

In order to photocatalytic degradation of ethylene in environmental pollution, TiO₂ (B) featuring a multiphase crystal structure was first synthesized via hydrothermal synthesis method. The efficiency of photocatalytic degradation of ethylene and methyl orange by TiO₂ (B) was up to 49.23% and 60%, respectively, and the specific surface area of TiO₂ (B) was as large as 277.69 m²/g. Subsequently, photocatalytic films loaded with the TiO₂ (B) were produced using an extrusion casting machine coupled with a twin-screw extruder. The mechanical properties and barrier property to oxygen were enhanced by adding 1% TiO₂ (B) to photocatalytic films. The hydrophilicity of the photocatalytic films and the decrease in contact angle confirmed the existence of the ‘Honda-Fujishima effect’. The highest degradation efficiency of methyl orange and ethylene by the photocatalytic film could reach 9% and 7.79%, respectively. Both TiO₂ (B) and photocatalytic films showed good antibacterial properties against Escherichia coli and Staphylococcus aureus. TiO₂ (B) and photocatalytic films have been shown to have excellent photocatalytic degradation performance of organic compounds.