title: Photo-active float for field water disinfection.
abstract: The present study investigates the antibacterial activity of a photoactive float fabricated with visible light active N-F-TiO2 for the disinfection of field water widely contaminated with Gram positive and Gram negative bacteria like, Salmonella typhimurium (Gram negative), Escherichia coli (Gram negative), Staphylococcus aureus (Gram positive), Bacillus species (Gram positive), and Pseudomonas species (Gram negative). The antibacterial activity can be attributed to the unique properties of the photocatalyst, which releases reactive oxygen species in aqueous solution, under the illumination of sunlight. N-F-TiO2 nanoparticles efficiently photocatalyse the destruction of all the bacteria present in the contaminated water, giving clean water. The inactivation of bacteria is confirmed by a standard plate count method, MDA, RNA and DNA analysis. The purity of water was further validated by SPC indicating nil counts of bacteria after two days of storing and testing. The photocatalysts were characterized by XRD, BET measurement, SEM, EDX, UV-Vis and PL analysis.
authors.affiliation: Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Bangalore-562112, India. cnms.jainuniversity.ac.in br.geetha@jainuniversity.ac.in.
authors.forename: R
authors.initials: R
authors.lastname: Shwetharani
authors.forename: R Geetha
authors.initials: RG
authors.lastname: Balakrishna
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D001407:Bacillus / Q000187:drug effects; D004203:Disinfection / Q000379:methods*; D004926:Escherichia coli / Q000187:drug effects; D005459:Fluorides / Q000737:chemistry / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests; D053758:Nanoparticles / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry / Q000494:pharmacology*; D010316:Particle Size; D055668:Photochemical Processes; D011549:Pseudomonas / Q000187:drug effects; D017382:Reactive Oxygen Species / Q000737:chemistry / Q000528:radiation effects; D012486:Salmonella typhimurium / Q000187:drug effects; D013211:Staphylococcus aureus / Q000187:drug effects; D013472:Sunlight; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology*; D014867:Water / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D017382:Reactive Oxygen Species; D014867:Water; C009495:titanium dioxide; D014025:Titanium; D009584:Nitrogen; D005459:Fluorides