ZnO/graphite composites and its antibacterial activity at different conditions

Journal of Photochemistry and Photobiology. B, Biology
Kateřina DědkováJana Kukutschová

Abstract

The paper reports laboratory preparation, characterization and in vitro evaluation of antibacterial activity of ZnO/graphite nanocomposites. Zinc chloride and sodium carbonate served as precursors for synthesis of zinc oxide, while micromilled and natural graphite were used as the matrix for ZnO nanoparticles anchoring. During the reaction of ZnCl2 with saturated aqueous solution of Na2CO3a new compound is created. During the calcination at the temperature of 500 °C this new precursors decomposes and ZnO nanoparticles are formed. Composites ZnO/graphite with 50 wt.% of ZnO particles were prepared. X-ray powder diffraction and Raman microspectroscopy served as phase-analytical methods. Scanning electron microscopy technique was used for morphology characterization of the prepared samples and EDS mapping for visualization of elemental distribution. A developed modification of the standard microdilution test was used for in vitro evaluation of daylight induced antibacterial activity and antibacterial activity at dark conditions. Common human pathogens served as microorganism for antibacterial assay. Antibacterial activity of ZnO/graphite composites could be based on photocatalytic reaction; however there is a role of Zn(2+) ions o...Continue Reading

References

Dec 13, 2006·Physical Review Letters·A C FerrariA K Geim
May 6, 2014·Journal of Photochemistry and Photobiology. B, Biology·Kateřina DědkováJana Kukutschová
Apr 25, 2015·Journal of Photochemistry and Photobiology. B, Biology·Kateřina DědkováJana Kukutschová

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Citations

Mar 7, 2019·Environmental Science and Pollution Research International·Hanan H MohamedDetlef W Bahnemann
Feb 6, 2019·Environmental Science and Pollution Research International·Guofei JiangXiaojuan Wang

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