News Column

New Nanotubes Findings from University of Cordoba Reported

June 27, 2014



By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Nanotubes. According to news originating from Cordoba, Spain, by NewsRx correspondents, research stated, "In this article, carbon coated titanium dioxide nanotubes (c-TNTs) have been synthesized. The synthesis of the bare TNTs (b-TNTs) using anatase as precursor and their coating with a caramel layer have been performed by simple and cheap hydrothermal processes."

Our news journalists obtained a quote from the research from the University of Cordoba, "The final conversion of the caramel layer in a carbon coating has been accomplished by a thermal treatment (600 C) in an inert (Ar) atmosphere. The c-TNTs have been characterized by different techniques including transmission microscopy, infrared spectroscopy, X-ray powder diffraction, thermogravimetry and Brunauer, Emmett and Teller (BET) adsorption isotherms. The extraction performance of the c-TNTs under a microextraction format has been evaluated and compared with that provided by b-TNTs and multiwalled carbon nanotubes (MWCNTs) using naproxen and ketoprofen as model analytes. c-TNTs provided better results than the other nanoparticles, especially at low acidic pH values. In addition, c-TNTs presented a better dispersibility than MWCNTs, which is very interesting for their use in dispersive micro-solid phase extraction. Finally, a microextraction format, adapted to low sample volumes, has been proposed and applied for the determination of naproxen and ketoprofen in saliva and urine samples by liquid chromatography with UV detection. The results indicate that this approach is promising for the analysis of biological samples. In fact, the recoveries were in the range between 96% and 119% while the precision, expressed as relative standard deviation, was better than 8.5% and 26.3% for urine and saliva, respectively."

According to the news editors, the research concluded: "The detection limits were in the range 34.1-40.8 mu g/L for saliva samples and 81.1-110 mu g/L for urine samples."

For more information on this research see: Carbon coated titanium dioxide nanotubes: Synthesis, characterization and potential application as sorbents in dispersive micro solid phase extraction. Journal of Chromatography A, 2014;1343():26-32. Journal of Chromatography A can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Chromatography A - www.elsevier.com/wps/product/cws_home/502688)

The news correspondents report that additional information may be obtained from M.T. Garcia-Valverde, University of Cordoba, Inst Fine Chem & Nanochem, Dept. of Analyt Chem, E-14071 Cordoba, Spain. Additional authors for this research include R. Lucena, F. Galan-Cano, S. Cardenas and M. Valcarcel (see also Nanotubes).

Keywords for this news article include: Spain, Europe, Cordoba, Chemicals, Chemistry, Light Metals, Nanotechnology, Titanium Dioxide, Emerging Technologies

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


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Source: Science Letter


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