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Issue 8, 2016
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A microporous silk carbon–ionic liquid composite for the electrochemical sensing of dopamine

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Abstract

Porous silk carbon (Silk C) was obtained through carbonization and KOH activation of natural silk cocoons. The as-prepared Silk C presented the good characteristics of a large surface area (SBET: 2854.53 m2 g−1) and a high volume of pores (1.54 cm3 g−1) with uniform micropores (2.5 nm) and multiple defects. The metal-free silk carbon–ionic liquid (Silk C–IL) composite, synthesized by modifying Silk C with ionic liquid through non-covalent (π–π) interactions under grinding conditions, was prepared for electrochemical determination of dopamine (DA). The detection limit of DA was 79 nM (S/N = 3) with a linear range from 0.6 μM to 140 μM. Meanwhile, the as-made Silk C–IL/GCE presented good selectivity for DA detection from other possible interferences, such as ascorbic acid, glucose and uric acid. Furthermore, the Silk C–IL/GCE was also successfully used for the detection of DA in fetal bovine serum and dopamine hydrochloride injection samples.

Graphical abstract: A microporous silk carbon–ionic liquid composite for the electrochemical sensing of dopamine

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Publication details

The article was received on 04 Jan 2016, accepted on 04 Mar 2016 and first published on 07 Mar 2016


Article type: Paper
DOI: 10.1039/C6AN00016A
Citation: Analyst, 2016,141, 2447-2453
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    A microporous silk carbon–ionic liquid composite for the electrochemical sensing of dopamine

    M. Wang, L. Bai, L. Zhang, G. Sun, X. Zhang and S. Dong, Analyst, 2016, 141, 2447
    DOI: 10.1039/C6AN00016A

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