Photocatalytic disinfection of titania nanotubes- graphitic carbon nitride
Presentation Type
Abstract
Faculty Advisor
Wanlu Li
Access Type
Event
Start Date
25-4-2025 12:00 PM
End Date
25-4-2025 1:00 PM
Description
Photocatalysis is a promising method for bacterial disinfection that uses visible light-activated materials to produce reactive species that can kill microorganisms. This study compares the photocatalytic disinfection efficiency of graphitic carbon nitride (GCN), Titania Nanotubesnanotubes-graphitic carbon nitride (TiNTbs-GCN), and Titania Nanotubes (TiNTbs) against Escherichia coli (E. coli) in phosphate-buffered saline (PBS). It is interesting to explore the disinfection efficiency of GCN-TiNTbs due to its high stability, large surface area, and ability to act as photocatalysts by absorbing light and generating reactive species. E. coli K-12 cultures were standardized to a concentration of 1×103 CFU/mL and exposed to photocatalysts using a solar simulator with UV cut-off and heat filter cut-off. The viability of bacteria is determined via the traditional plating method. GCN-TiNTbs showed a viability of 52 % after having an exposure time of two hours under visible light. TiNTbs itself did not show any disinfection activity. These results showed that compositing GCN with TiNTbs will bring the photocatalytic disinfection properties to TiNTbs under visible light.
Photocatalytic disinfection of titania nanotubes- graphitic carbon nitride
Photocatalysis is a promising method for bacterial disinfection that uses visible light-activated materials to produce reactive species that can kill microorganisms. This study compares the photocatalytic disinfection efficiency of graphitic carbon nitride (GCN), Titania Nanotubesnanotubes-graphitic carbon nitride (TiNTbs-GCN), and Titania Nanotubes (TiNTbs) against Escherichia coli (E. coli) in phosphate-buffered saline (PBS). It is interesting to explore the disinfection efficiency of GCN-TiNTbs due to its high stability, large surface area, and ability to act as photocatalysts by absorbing light and generating reactive species. E. coli K-12 cultures were standardized to a concentration of 1×103 CFU/mL and exposed to photocatalysts using a solar simulator with UV cut-off and heat filter cut-off. The viability of bacteria is determined via the traditional plating method. GCN-TiNTbs showed a viability of 52 % after having an exposure time of two hours under visible light. TiNTbs itself did not show any disinfection activity. These results showed that compositing GCN with TiNTbs will bring the photocatalytic disinfection properties to TiNTbs under visible light.
Comments
Poster presentation at the 2025 Student Research Symposium.