A multifunctional biocide/sporocide and photocatalyst based on titanium dioxide (tio2) codoped with silver, carbon, and sulfur Article

Hamal, DB, Haggstrom, JA, Marchin, GL et al. (2010). A multifunctional biocide/sporocide and photocatalyst based on titanium dioxide (tio2) codoped with silver, carbon, and sulfur . LANGMUIR, 26(4), 2805-2810. 10.1021/la902844r

cited authors

  • Hamal, DB; Haggstrom, JA; Marchin, GL; Ikenberry, MA; Hohn, K; Klabunde, KJ

authors

abstract

  • Composite nanostructured samples of Ag (0.5-20%)/(C, S)-TiO2 were synthesized and characterized by EDX, XRD, FT-IR,UV-vis, BET, XPS, and zeta potentialmeasurements. Photocatalytic and biocidal tests revealed that the amount of the codoped silver (Ag + ) in (C, S)-TiO2 played a crucial, distinctive role in the photodegradation of gas-phase acetaldehyde as well as in the inactivation of Escherichia coli cells and Bacillus subtilis spores. Very interestingly, Ag/(C, S)-TiO2 nanoparticles (crystallite size <10 nm) have shown very strong antimicrobial properties without light activation against both E. coli (log kill>8) and B. subtilis spores (log kill>5) for 30 min exposures, compared with P25-TiO2. Thus, for the first time, we have demonstrated that titanium dioxide (an environmentally friendly photocatalyst) codoped with silver, carbon, and sulfur can serve as a multifunctional generic biocide as well as a visible light activated photocatalyst. © 2009 American Chemical Society.

publication date

  • February 16, 2010

published in

Digital Object Identifier (DOI)

start page

  • 2805

end page

  • 2810

volume

  • 26

issue

  • 4