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• W2028875253 abstract "This review focuses on the antibacterial activities of visible light-responsive titanium dioxide (TiO2) photocatalysts. These photocatalysts have a range of applications including disinfection, air and water cleaning, deodorization, and pollution and environmental control. Titanium dioxide is a chemically stable and inert material, and can continuously exert antimicrobial effects when illuminated. The energy source could be solar light; therefore, TiO2 photocatalysts are also useful in remote areas where electricity is insufficient. However, because of its large band gap for excitation, only biohazardous ultraviolet (UV) light irradiation can excite TiO2, which limits its application in the living environment. To extend its application, impurity doping, through metal coating and controlled calcination, has successfully modified the substrates of TiO2 to expand its absorption wavelengths to the visible light region. Previous studies have investigated the antibacterial abilities of visible light-responsive photocatalysts using the model bacteria Escherichia coli and human pathogens. The modified TiO2 photocatalysts significantly reduced the numbers of surviving bacterial cells in response to visible light illumination. They also significantly reduced the activity of bacterial endospores; reducing their toxicity while retaining their germinating abilities. It is suggested that the photocatalytic killing mechanism initially damages the surfaces weak points of the bacterial cells, before totally breakage of the cell membranes. The internal bacterial components then leak from the cells through the damaged sites. Finally, the photocatalytic reaction oxidizes the cell debris. In summary, visible light-responsive TiO2 photocatalysts are more convenient than the traditional UV light-responsive TiO2 photocatalysts because they do not require harmful UV light irradiation to function. These photocatalysts, thus, provide a promising and feasible approach for disinfection of pathogenic bacteria; facilitating the prevention of infectious diseases." @default.
• W2028875253 created "2016-06-24" @default.
• W2028875253 creator A5032020891 @default.
• W2028875253 creator A5071633963 @default.
• W2028875253 date "2012-06-08" @default.
• W2028875253 modified "2023-10-11" @default.
• W2028875253 title "Bactericidal Effects and Mechanisms of Visible Light-Responsive Titanium Dioxide Photocatalysts on Pathogenic Bacteria" @default.
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• W2028875253 doi "https://doi.org/10.1007/s00005-012-0178-x" @default.
• W2028875253 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22678625" @default.
• W2028875253 hasPublicationYear "2012" @default.
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