Visible-Light-Induced Bactericidal Activity of Vanadium-Pentoxide (V2O5)-Loaded TiO2 Nanoparticles

Title
Visible-Light-Induced Bactericidal Activity of Vanadium-Pentoxide (V2O5)-Loaded TiO2 Nanoparticles
Authors
김연석송민영박은석진성민배귀남정종수
Keywords
bactericidal activity; Visible light; vanadium pentoxide; TiO2; nanoparticles; Photocatalysis
Issue Date
2012-11
Publisher
Applied biochemistry and biotechnology
Citation
VOL 168, NO 5, 1143-1152
Abstract
The bactericidal activity of TiO2 nanoparticles under visible light is very important in regards to its practical applications. In this paper, we synthesized vanadiumpentoxide- loaded TiO2 nanoparticles (V2O5–TiO2) using a chemical vapor condensation method, followed by the impregnation method, and characterized its physicochemical properties through X-ray diffraction patterning, X-ray photoelectron spectroscopy analysis, Raman spectra analysis, and Fourier transform infrared analysis. In addition, the antibacterial activity of V2O5–TiO2 nanoparticles against E. coli was evaluated and compared with pure TiO2 nanoparticles. In these experiments, the population of E. coli was shown to be significantly reduced by V2O5–TiO2 nanoparticles under illumination with fluorescent light, whereas pure TiO2 nanoparticles showed about 3.3-fold lower antibacterial activity than the V2O5–TiO2 nanoparticles. This result was most likely due to the change in surface conditions of the TiO2 nanoparticles, which was due to the loading of vanadium pentoxide on the TiO2 nanoparticles. Furthermore, both photocatalysts showed similar antibacterial activity under UV-A (352 nm) irradiation.
URI
http://pubs.kist.re.kr/handle/201004/44320
ISSN
02732289
Appears in Collections:
KIST Publication > Article
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