Abstract
Stable Ag nanoparticles supported on multi-walled carbon nanotubes (MWCNTs) have been successfully synthesized by calcinations of the complexes of Ag cation and acid-treated MWCNTs under sparging N2. The nanocomposites are characterized in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy. The results indicate that Ag nanoparticles are relatively homogeneously dispersed on the surface of MWCNTs. The bactericidal properties of Ag/MWCNT nanocomposites are investigated with disk diffusion assay on the suspension samples inoculated with Escherichia coli. The results show that Ag/MWCNTs-500 nanocomposites possess excellent bactericidal property because of their suitable particle size (15nm). Moreover, Ag nanoparticles supported on MWCNTs are very stable for half a year. What is more, the bactericidal effect was enhanced obviously under solar irradiation. This is because MWCNTs can absorb near-infrared light to kill parts of bacteria. A possible formation mechanism is also proposed in this article.
Original language | English |
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Pages (from-to) | 466-472 |
Number of pages | 7 |
Journal | Journal of Hazardous Materials |
Volume | 187 |
Issue number | 1-3 |
DOIs | |
State | Published - 15 Mar 2011 |
Externally published | Yes |
Keywords
- Ag nanoparticle
- Bactericidal property
- Escherichia coli
- Favorable stability
- Multi-walled carbon nanotube