By a News Reporter-Staff News Editor at Life Science Weekly -- Research findings on Nanotechnology are discussed in a new report. According to news reporting out of Pretoria, South Africa, by NewsRx editors, research stated, "Composites of silver-zinc oxide nanoparticles supported on bentonite clay were synthesized by the microwave-assisted synthesis method for use as an antibacterial material. Silver nitrate was used as the precursor of silver nanoparticles while zinc oxide nanoparticles were commercially sourced."
Our news journalists obtained a quote from the research from the Tshwane University of Technology, "The composites were characterized by powder X-ray diffraction (XRD), transmission electron microscope (TEM), Fourier transform infrared (FTIR) and BET surface area measurements. XRD spectra showed peaks of silver confirming the formation of the silver and not of the silver nitrate or any other impurity of the metal. Meanwhile TEM confirmed the formation of silver and zinc oxide nanoparticles on the clay layers, with particle sizes ranging from 9-30 nm and 15-70 nm, respectively. The antibacterial activities of the composites were evaluated against Gram negative Escherichia coil bacteria and Gram positive Enterococcus faecalis bacteria by the disc diffusion method. Whereas both composites of Ag-clay and ZnO-clay showed good antibacterial activity against bacteria, a better antibacterial activity was observed with Ag/ZnO-clay composite."
According to the news editors, the research concluded: "The results therefore reveal that Ag/ZnO-clay composite is a promising bactericide that can be used for deactivating microbes in water."
For more information on this research see: Microwave-assisted synthesis, characterization and antibacterial activity of Ag/ZnO nanoparticles supported bentonite clay. Journal of Hazardous Materials, 2013;262():439-446. Journal of Hazardous Materials can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Hazardous Materials - www.elsevier.com/wps/product/cws_home/502691)
Our news journalists report that additional information may be obtained by contacting S.C. Motshekga, Tshwane Univ Technol, Dept. of Environm Water & Earth Sci, ZA-0001 Pretoria, South Africa. Additional authors for this research include S.S. Ray, M.S. Onyango and M.N.B. Momba (see also Nanotechnology).
Keywords for this news article include: Pretoria, Bentonite, Chemistry, Zinc Oxide, South Africa, Nanoparticle, Silicic Acid, Nanotechnology, Zinc Compounds, Silicon Dioxide, Oxygen Compounds, Silicon Compounds, Aluminum Silicates, Inorganic Chemicals, Emerging Technologies
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