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Researchers at Institute of Nuclear Research Release New Data on Chalcogens (Preparation of graphene oxide and characterisation using electron...

July 8, 2014



Researchers at Institute of Nuclear Research Release New Data on Chalcogens (Preparation of graphene oxide and characterisation using electron spectroscopy)

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Chalcogens have been published. According to news originating from Debrecen, Hungary, by NewsRx correspondents, research stated, "Graphene oxide was prepared from commercial graphene powder (G) platelets of 8 nm thickness by oxidation in ozone (G-O3) and low-energy (cold) glow air plasma in a pink region (G-PP). X-ray photoelectron spectroscopy (XPS) was applied for chemical characterisation of the atomic content and for obtaining quantitative information on C hybridisation."

Our news journalists obtained a quote from the research from the Institute of Nuclear Research, "Reflection electron energy loss spectroscopy (REELS) was used for characterising the surface structure including the content of surface and bulk carbon atoms of sp(2) and sp(3) hybridisation. The G-O3 and G-PP graphene oxide samples contain a low amount of C sp(3) bonds and carbon-oxygen groups in comparison to graphene oxide prepared by the 'wet' chemical methods. Oxidation of commercial graphene platelets powder, especially in air plasma, leads to increasing surface C sp(3) and significantly bulk C sp(3) contributions, indicating intercalation by oxygen groups. The intensity ratio of the REELS pi + sigma C sp(2) bulk to the C sp(2) surface energy loss peaks, decreasing in the order G>G-O3 >G-PP, indicates exfoliation of layers in G-O3 and G-PP by oxygen functional groups and water with decreasing average number of layers in graphene oxide nanostructures due to oxidation."

According to the news editors, the research concluded: "Although, the 'wet' chemical methods are more effective for oxidation leading to a larger amount of C sp(3) and oxygen groups, the proposed methods of oxidation by ozonation and in air plasma are inexpensive, safe, effective, environmentally friendly and do not result in toxic chemical waste products."

For more information on this research see: Preparation of graphene oxide and characterisation using electron spectroscopy. Journal of Electron Spectroscopy and Related Phenomena, 2014;193():92-99. Journal of Electron Spectroscopy and Related Phenomena can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Electron Spectroscopy and Related Phenomena - www.elsevier.com/wps/product/cws_home/500848)

The news correspondents report that additional information may be obtained from B. Lesiak, Hungarian Academy Sci, MTA ATOMKI, Inst Nucl Res, H-4001 Debrecen, Hungary. Additional authors for this research include L. Stobinski, A. Malolepszy, M. Mazurkiewicz, L. Kover and J. Toth (see also Chalcogens).

Keywords for this news article include: Europe, Hungary, Debrecen, Chalcogens

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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