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In situ magnesiothermal synthesis of mesoporous MgO/OMC composite for sensitive detection of lead ions
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2016 (English)In: Electroanalysis, ISSN 1040-0397, E-ISSN 1521-4109, Vol. 28, no 12, 2939-2946 p.Article in journal (Refereed) Published
Abstract [en]

Mesoporous materials have exceptional properties for application owing to their ability to absorb and interact with guest species. A novel MgO/OMC composite with mesoporous structure was successfully synthesized via in situ magnesiothermic reduction. The structure was confirmed by N-2 sorption isotherms, X-ray diffraction pattern (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). By using nafion and bismuth films as co-modifiers, the MgO/OMC composite material shows high sensitivity of 0.113 mu A.L mu g(-1) and lower background current for electrochemical determination of lead ion (Pb2+) by using anodic stripping voltammetry. The high specific surface area and good mass transfer on the proposed mesoporous material, as well as the outstanding adsorption abilities of MgO to metal ions and the excellent conductivity of the carbon skeleton contribute to the enhanced electrochemical response of Pb2+. As the stripping response of Bi/MgO/OMC-Nafion/PGE is highly linear (R-2 = 0.998) over a Pb2+ concentration range of 2 to 300 mg/L, it was successfully used to analyse Pb2+ in real tap-water samples with good recoveries.

Place, publisher, year, edition, pages
2016. Vol. 28, no 12, 2939-2946 p.
Keyword [en]
magnesium oxide, ordered mesoporous carbon, in situ magnesiothermic reduction, lead detection
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-131888DOI: 10.1002/elan.201600348ISI: 000392824200006OAI: oai:DiVA.org:umu-131888DiVA: diva2:1076911
Available from: 2017-02-24 Created: 2017-02-24 Last updated: 2017-02-24Bibliographically approved

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Wågberg, ThomasHu, Guangzhi
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Citation style
  • apa
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  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • text
  • asciidoc
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