Preparation and antibacterial properties of three-dimensional nanoflower-shaped photocatalytic material Bi12TiO20

Semiconductor photocatalytic antibacterial materials, an innovative and eco-friendly antibacterial technology, have been widely studied. This approach uses indoor light or sunlight as energy sources, showing high-efficiency, broad-spectrum antibacterial properties without drug-resistance or secondary pollution risks. In this research, ordered mesoporous TiO 2 was synthesized via the template method. Then, Bi ions were doped into TiO 2 to obtain the flower-shaped Bi 12 TiO 20 photocatalytic nanomaterial. This material is catalyzed by light for the first time, and its antibacterial efficacy against five bacterial strains ( E. coli, Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis, and Candida albicans ) was analyzed. The results showed excellent bactericidal activity against bacteria and effective antifungal inhibition. XRD, SEM, EDS, and UV-Vis techniques characterized the photocatalyst's crystal structure, morphology, and optical properties to confirm their validity. It was confirmed that the nano-flower morphology enhanced absorption capacity and improved electron-hole separation and electron transport efficiencies. Toxicity tests verified the material's non-toxicity. The nanoflower-shaped photocatalytic antibacterial material developed has great potential for eliminating harmful microorganisms and can be applied in various environmental protection fields.