New Evidence for TiO2 Photocatalysis during Bilayer Lipid Peroxidation

  title={New Evidence for TiO2 Photocatalysis during Bilayer Lipid Peroxidation},
  author={Jayalakshmi K. and and Victor A. Nadtochenko},
  journal={Journal of Physical Chemistry B},
The photocatalytic peroxidation of the bovine brain l-α-phosphatidyl-ethanolamine (PE) vesicle was measured and used as a model for phospholipid peroxidation. Synthetic phosphatidyl-ethanolamine, E. coli phosphatidyl-ethanolamine, lipid polysaccharide (LPS), and cardiopilin were used to compare the TiO2 photocatalysis leading to cell wall membrane degradation. During the photocatalytic degradation, the appearance and growth kinetics were followed for (a) conjugated double bond formation, (b… Expand
Lipid vesicles as model membranes in photocatalytic disinfection studies
Abstract The potential use of solar-powered photocatalytic disinfection water systems is an attractive concept and has generated much research over the last two decades. Photocatalytic inactivationExpand
Laser kinetic spectroscopy of the interfacial charge transfer between membrane cell walls of E. coli and TiO2
This laser kinetics features of the electron decay of TiO2 in the presence of the Escherichia coli (E. coli) phosphatidyl-ethanolcholine (PE) and lipo-polysaccharides (LPS) cell wall components wereExpand
Photocatalytic antibacterial activity of nano-TiO2 (anatase)-based thin films: effects on Escherichia coli cells and fatty acids.
It is suggested that peroxidation and decomposition of membrane fatty acids could be one of the factors contributing to the morphological changes of bacteria observed under SEM, and ultimately, cell death. Expand
Effect of surface pretreatment of TiO2 films on interfacial processes leading to bacterial inactivation in the dark and under light irradiation
Radio-frequency plasma pretreatment enhancing the amount and adhesion of TiO2 sputtered on polyester (PES) and on polyethylene (PE) films and the mechanism leading to E. coli loss of viability on PES–TiO2 was investigated in the dark up to complete bacterial inactivation by monitoring the damage in the bacterial outer cell by transmission electron microscopy. Expand
Effect of photocatalysis (TiO2 /UVA) on the inactivation and inhibition of Pseudomonas aeruginosa virulence factors expression.
TiO2 / UVA is an effective method to reduce P. aeruginosa virulence and to prevent biofilm formation in water disinfection using visible light-active photocatalyst. Expand
Role of particle coating in controlling skin damage photoinduced by titania nanoparticles
The combined use of lipid peroxidation of simple fatty acids with ESR analysis is here proposed as a possible screening tool for the evaluation of the potential toxicity of nano-titania in sunscreen preparations. Expand
Insights into the Photocatalytic Bacterial Inactivation by Flower-Like Bi2WO6 under Solar or Visible Light, Through in Situ Monitoring and Determination of Reactive Oxygen Species (ROS)
This study addresses the visible light-induced bacterial inactivation kinetics over a Bi2WO6 synthesized catalyst. The systematic investigation was undertaken with Bi2WO6 prepared by the complexationExpand
Photocatalysis and disinfection of water: Identification of potential bacterial targets
Abstract In order to identify some of the potential bacterial targets, the effects of TiO 2 nanoparticles on bacteria in aqueous suspension were assessed in the dark and under UV-A ( λ  > 340 nm)Expand
Kinetics and mechanism for transparent polyethylene-TiO2 films mediated self-cleaning leading to MB dye discoloration under sunlight irradiation
Polyethylene-TiO2 (from now on PE-TiO2) transparent, non-scattering sputtered films have been found effective in the discoloration of methylene blue (MB) under low intensity solar simulated light. ByExpand
A New Perspective in the Use of FeOx-TiO2 Photocatalytic Films: Indole Degradation in the Absence of Fe-Leaching
The study addresses the degradation of Indole under low intensity solar simulated light. The first evidence is presented for sputtered films degrading Indole at the solid-air interface. TheExpand