Abstract
Multiwalled carbon nanotubes (MWCNT) were covered with reduced graphene oxide nanoribbons (rGONR) to give a material with a core-shell heterostructure of the type MWCNT@rGONR. It was obtained by (a) longitudinal partial unzip** of MWCNT to form MWCNT@GONR, and (b) subsequent chemical reduction with hydrazine to give MWCNT@rGONR. The MWCNT@rGONR heterostructure was used to modify a glassy carbon electrode (GCE) to obtain an electrochemical sensor for p-dihydroxybenzene (DHB). The synergistic effects of the MWCNT and the rGONR results in a distinctly improved redox current towards DHB compared to a bare GCE, an MWCNT/GCE, and an MWCNT@GONR/GCE. At the working voltage range from −100 to 400 mV, it displays a linear response to DHB in the 80 to 3000 nM concentration range with a 20 nM detection limit.
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Multiwalled carbon nanotubes covered with reduced graphene oxide nanoribbons (MWCNT@rGONR) core-shell heterostructure was obtained by longitudinal partial unzip** of MWCNT and subsequent chemical reduction. The MWCNT@rGONRs were used for highly sensitive electrochemical sensing of p-dihydroxybenzene.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (21405062), the China Postdoctoral Science Foundation (2014 M551507, 2014 M550271), Scientific Research Foundation for the Talents in Jiangsu University (13JDG091), Jiangsu Planned Projects for Postdoctoral Research Funds (2014).
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Zhu, G., Yi, Y., Zou, B. et al. A glassy carbon electrode modified with a multiwalled carbon nanotube@reduced graphene oxide nanoribbon core-shell structure for electrochemical sensing of p-dihydroxybenzene. Microchim Acta 182, 871–877 (2015). https://doi.org/10.1007/s00604-014-1401-8
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DOI: https://doi.org/10.1007/s00604-014-1401-8