Abstract
Facing the crisis of rising global pollution levels and the increasing threat of new pathogens, innovative and efficient strategies for degrading industrial waste and eliminating harmful pathogens are urgently needed. Therefore, we carefully designed and integrated CuO@TiO2 nanocomposite with a p-n heterojunction structure. Tests such as XRD, SEM, EDS and TEM showed that CuO was successfully and uniformly compounded on the surface of TiO2 to form nanoparticles with an average particle size of about 21 nm. Through carefully controlled experiments, we have demonstrated that these nanocomposites can degrade methylene blue by up to 83.90 % under irradiation with a xenon lamp, and maintain a relatively stable high degradation rate in repeatable photocatalytic tests, which highlights their great potential for pollution reduction. In addition, these nanocomposites also have a certain antibacterial effect. After 12 h of incubation in the dark, the bacterial survival rate was reduced to 94.07 %, and under light conditions, it was reduced to 92.35 %. It can be clearly seen under the microscope that the cell contents have leaked out and appear flocculent due to the rupture of the bacterial cells. These results are attributed to the synergistic effect of the release of Cu2+ and photocatalytic activity in the nanocomposite. This integrated approach positions CuO@TiO2 nanocomposite as a sustainable and cost-effective alternative to conventional antimicrobial agents and photocatalysts, paving the way for their wide application in environmental purification and microbial control.
Published Version
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