Chemical Research in Chinese Universities ›› 2013, Vol. 29 ›› Issue (1): 132-138.doi: 10.1007/s40242-013-2118-7

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Highly Sensitive and Selective Amperometric Sensor for Iodate Based on 9,10-Phenanthrenequinone Derived Graphene

WANG Hong-juan, CHENG Na-na, YANG Xiao-yang, LI Xiao-meng, ZHU Lian-de   

  1. Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
  • Received:2012-03-22 Revised:2012-04-23 Online:2013-02-01 Published:2013-01-23
  • Supported by:

    Supported by the Science Foundation of Jilin Province, China(No.20090532).

Abstract:

We reported on a new amperometric sensor for the sensitive and selective determination of iodate in table salt. The iodate sensor was constructed by the integration of a novel nanocomposite which was made from 9,10-phenanthrenequinone(PQ) and graphene(GP) with a glassy carbon electrode(GCE). The synthesized graphene and the nanocomposite were well characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), Fourier transform infrared(FTIR) spectroscopy and Raman spectroscopy. We fully studied the electrochemical behavior and kinetic characteristics of the PQ/GP nanocomposite at GCE. The PQ/GP electrode shows a good electrochemical catalytic activity towards the reduction of iodate, which makes itself a sensitive and selective electrochemical sensor for iodate. The iodate sensor displays a high sensitivity(1.04 mA·mmol·L-1), a low detection limit(1.0×10-8 mol/L), a rapid response(less than 2 s), and a broad linear range(from 5.0×10-8 mol/L to 6.0×10-3 mol/L ). In addition, the sensor is interference free. The practical application of the proposed sensor was tested by the detection of iodate in table salt.

Key words: 9,10-Phenanthrenequinone, Graphene, Amperometric sensor, Iodate