TITLE:
Photokilling of Escherichia coli Using Hybrid Titania Nanoparticles Suspended in an Aqueous Liquid
AUTHORS:
Christophe Massard, Muriel Bonnet, Philippe Veisseire, Yves Sibaud, Eric Caudron, Komla Oscar Awitor
KEYWORDS:
Anatase TiO2; Photocatalysis; Sol-Gel; Bacteria; Photokilling; Escherichia coli
JOURNAL NAME:
Journal of Biomaterials and Nanobiotechnology,
Vol.4 No.2,
April
17,
2013
ABSTRACT: In this work, the photokilling of Escherichia coli using a “one-pot” synthesized suspension of anatase crystallized
nanoparticles is evaluated. Preliminary to the biological tests concerning the antibacterial
efficiency, the fabricated suspension, using a derived solgel process in soft chemistry condition, is characterized.
Structural properties of the nanoparticles are investigated using Electronic Transmission Microscopy (TEM)
equipped with Selected Area Electron Diffraction (SAED) probe and X-ray diffraction.
The inorganic solid content was evaluated by Thermogravimetric Analysis (TGA). Photodegradation of Acid Orange 7 in aqueous solution was
used a probe to assess the photocatalytic activity of the elaborated suspension under
UV irradiation. The photokilling of Escherichia coli in presence of hybrid TiO2 nanoparticles suspended in aqueous liquid under UV irradiation is evaluated. Such
TiO2 nanoparticles suspension shows a strong bactericidal activity with
the total destruction of bacteria after only one hour.