Influence of Functionalization MWCNTs Using Acid Treatment on Gram Negative and Gram Positive Bacteria | ||
| Iraqi Journal of Applied Physics | ||
| Article 1, Volume 10, Issue 3, September 2014, Pages 29-33 | ||
| Authors | ||
| Adawiya J. Haider; Mohammed R. Mohammed; Duha S. Ahmed | ||
| Abstract | ||
| In this work, the effect of chemical acids (like, mixture of H2SO4, HNO3 and H2O2) on the surface functionalization of multiwalled carbon nanotubes (F-MWCNTs) is illustrated. This effect leads to create functional groups like carboxyl (-COOH) and hydroxyl groups on the surface as well on the side walls of MWCNTs. The degree of covalent functionalization was examined by using Fourier transformed infrared spectroscopy (FTIR) which proved the formation of oxygen containing groups such as C=O and COOH. Transmission electron microscopy (TEM) used to characterize the morphological of surface modification on the MWCNTs structure due to oxidation by acid treatment during functionalization process. The antibacterial action of functionalized F-MWCNTs are tested for their efficiency in destroying the pathogenic bacteria, Gram negative (E. coli ) and Gram positive (S. aureus) bacteria, in addition to evaluate of bacterial adsorption on F-MWCNTs that are attributed to their fibrous shape with high aspect ratio. The results obtained indicate that modified F-MWCNTs were able to remove from 80-90% of E. coli at large exposure times while a higher removal of bacteria (up to 100%) of S. aureus was achieved when F-MWCNTs was used under the same conditions and improved antibacterial action of F-MWCNTs for the removal of Bacteria from water using modified F-MWCNTs. | ||
| Keywords | ||
| antibacterial; Carbon Nanotubes; antimicrobial activity; Functionalization | ||
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