Issue 8, 2016

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

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

Supplementary files

Article information

Article type
Paper
Submitted
04 ⵉⵏⵏ 2016
Accepted
04 ⵎⴰⵕ 2016
First published
07 ⵎⴰⵕ 2016

Analyst, 2016,141, 2447-2453

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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