Enhanced photocatalytic inactivation of bacteria on Fe-containing TiO2 nanoparticles under fluorescent light

J Mater Sci Mater Med. 2016 Mar;27(3):57. doi: 10.1007/s10856-016-5675-8. Epub 2016 Jan 19.

Abstract

In this paper, the photocatalytic activity of Fe-TiO2 nanoparticles (NPs) under fluorescent light was studied using Escherichia coli and Staphylococcus aureus. Fe-TiO2 NPs were synthesized using a sol-gel method and characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectroscopy (UV-vis DRS) and transmission electron microscopy. The efficiency of photocatalytic inactivation towards E. coli was studied under different physicochemical parameters. The photocatalytic inactivation rate increased with increasing Fe content in TiO2 NPs and the highest inactivation was achieved for 3.0 mol% Fe-TiO2 NPs under fluorescent light. These results demonstrate that the presence of an optimum concentration of Fe in TiO2 matrix enhances the photocatalytic inactivation of TiO2 NPs under fluorescent light.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Adhesion
  • Escherichia coli / radiation effects*
  • Hydrogen-Ion Concentration
  • Iron / chemistry*
  • Light*
  • Metal Nanoparticles / chemistry*
  • Photochemical Processes
  • Photoelectron Spectroscopy
  • Staphylococcus aureus / radiation effects*
  • Titanium / chemistry*
  • X-Ray Diffraction

Substances

  • titanium dioxide
  • Titanium
  • Iron