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New Findings from Nanyang Technological University in the Area of Chalcogens Reported (Graphene Oxides: Transformations in Natural Waters over a...

July 29, 2014



New Findings from Nanyang Technological University in the Area of Chalcogens Reported (Graphene Oxides: Transformations in Natural Waters over a Period of Three Months)

By a News Reporter-Staff News Editor at Life Science Weekly -- Research findings on Chalcogens are discussed in a new report. According to news originating from Singapore, Singapore, by NewsRx correspondents, research stated, "Graphene oxide (GO), a derivative of graphene consisting of various oxygen moieties, has gained popularity owing to its excellent physiochemical properties and applicability in various fields. GO nanomaterials can be synthesized by using Hofmann (HO), Hummers (HU), and Staudenmaier (ST) methods of oxidative treatment of graphite to give GO-HO, GO-HU, and GO-ST, respectively."

Our news journalists obtained a quote from the research from Nanyang Technological University, "These GO nanomaterials were found to exhibit different degrees of cytotoxicity that were suggested to be dependent on the amount and type of the oxygen-containing functional group present in the nanomaterials. Therefore, in this study, the transformations of GO-HO, GO-HU, and GO-ST nanomaterials in three types of natural waters over time were investigated to determine whether the oxygen-containing functional groups present in these nanomaterials undergo any changes after residing in natural waters. Based on the data obtained from Raman spectroscopy and X-ray photoelectron spectroscopy, although the density of defects in the GO nanomaterials remained relatively similar (a slight increase was detected in the GO-HO nanomaterials) over the period of examination, changes in the oxygen content of the GO nanomaterials were observed in most of the GO suspensions, which suggests that interaction between the natural waters and the GO nanomaterials do occur. Cyclic voltammetry measurements revealed that the natural waters had opposing effects on the GO nanomaterials: the GO-HU nanomaterials suffered a reduction in the amount of electroactive oxygen-containing functional groups present, whereas an increase was observed in the GO-HO and GO-ST nanomaterials. In addition, it was proposed that some of the electroactive oxygen moieties were completely lost from the GO-ST nanomaterials after exposing them to the natural waters."

According to the news editors, the research concluded: "More studies should be performed in the future to comprehend the underlying mechanism for the transformations observed in this study so that the fate, transport, and toxicity of GO nanomaterials in environmental waters can be better understood."

For more information on this research see: Graphene Oxides: Transformations in Natural Waters over a Period of Three Months. Chempluschem, 2014;79(6):844-849. Chempluschem can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Chempluschem - onlinelibrary.wiley.com/journal/10.1002/(ISSN)2192-6506)

The news correspondents report that additional information may be obtained from W.Z. Teo, Nanyang Technological University, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore 637371, Singapore (see also Chalcogens).

Keywords for this news article include: Singapore, Singapore, Asia, Chalcogens, Emerging Technologies, Nanomaterial, Nanotechnology

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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