The study of photocatalytic activity of Cu-ZnO nanoparticals coated on glass surface for improvement of anti- bacterial properties

Cu-ZnO thin films were fabricated on glass surface substrates by the sol–gel dip-coating method. The grain size and film thickness of the Cu-ZnO thin film decreased as a function of the Cu on centrations. All prepared films showed a very high transmittance above up 85% in the visible region (400–800 nm). The film prepared from the Zn2+ solution containing 0.5 mol of copper ions had the highest photocatalytic activity. The increased photocatalytic activity of Cu-ZnO is attributed to intrinsic oxygen vacancies due to high. surface to volume ratio in nanorods and extrinsic defect due to Cu doping On the other hand, this enhances the photocatalytic activity caused by the improving of the crystallinity and the surface roughness of ZnO thin films with an increase in calcination temperature. The Cu-Zno film showed enhanced antibacterial activity compared to pure ZnO film against a Gram negative (Escherichia coli) and a Gram positive (Staphylococcus aureus) bacteria. This ensures that he Cu-Zno thin films can act as a UV blocking agent with enhanced photocatalytic and antibacterial activities.

کلیدواژه ها:

Cu-ZnO ، Photocatalytic activity ، Dip-coating ، Sol-gel ، Antibacterial properties