By a News Reporter-Staff News Editor at Science Letter -- Investigators discuss new findings in Nanoparticles. According to news originating from Esfahan, Iran, by NewsRx correspondents, research stated, "Coating of ZnS and CdS nanoparticles with organic and inorganic materials can extend their light absorption in the visible region and their stability against photo-corrosion. Such materials could emerge as excellent photocatalysts for the elimination of pollutants from aqueous media using solar energy."
Our news journalists obtained a quote from the research from the University of Isfahan, "In this study, PVP (polyvinyl pyrrolidone)-capped ZnS and CdS nanoparticles, ZnS/CdS and CdS/ZnS core shell nanoparticles were synthesized by microwave irradiation method and characterized using different techniques. The XRD patterns exhibited cubic and hexagonal structures for coated ZnS and CdS nanoparticles, respectively. Morphological evaluation of TEM images showed that the nanoparticles are generally spherical in shape. The UV-visible spectra confirmed a shift in the band gap of coated nanoparticles to longer or shorter wavelengths due to size and potential-well effects. The photocatalytic activity of nanoparticles toward dye degradation under visible light was found to be improved after coating. PVP-capped ZnS and CdS exhibited an enhancement in the initial methylene blue degradation efficiency by a factor of about 1.3. ZnS nanoparticles coated by CdS displayed the initial efficiency 3.2 times higher than bare ZnS."
According to the news editors, the research concluded: "The maximum dye removal was obtained in presence of CdS/ZnS core shells which is 1.4 times more efficient than bare CdS."
For more information on this research see: Enhancement of visible light photocatalytic activity of ZnS and CdS nanoparticles based on organic and inorganic coating. Applied Surface Science, 2014;290():440-447. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)
The news correspondents report that additional information may be obtained from N. Soltani, Univ Isfahan, Fac Adv Sci & Technol, Dept. of Nucl Engn, Esfahan 8174673441, Iran. Additional authors for this research include E. Saion, W.M.M. Yunus, M. Erfani, M. Navasery, G. Bahmanrokh and K. Rezaee (see also Nanoparticles).
Keywords for this news article include: Iran, Asia, Esfahan, Photocatalyst, Nanotechnology, Photocatalytic, Emerging Technologies
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