Citation: YU Hao, XU Na, GAO Xiao-Ling, JIN Jun. Simultaneous Determination of Hydroquinone and Catechol Using Gold Nanoparticles-Overoxidized Polypyrrole-Multi-walled Carbon Nanotubes Composite Film Modified Electrode[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(7): 1077-1084. doi: 10.11895/j.issn.0253-3820.160112 shu

Simultaneous Determination of Hydroquinone and Catechol Using Gold Nanoparticles-Overoxidized Polypyrrole-Multi-walled Carbon Nanotubes Composite Film Modified Electrode

YU Hao ^1,2, ,
XU Na ¹ ,
GAO Xiao-Ling ¹ ,
JIN Jun ^1,2

1.
College of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, China;
2.
Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an 716000, China

Received Date: 19 February 2016
Revised Date: 11 April 2016

Figures(8)

A carbon ceramic electrode (CCE) was modified with a composite film composed of gold nanoparticles (AuNPs), overoxidized polypyrrole (OPPy), and multi-walled carbon nanotubes (MWCNTs) by two-step procedure. Firstly, MWCNTs were modified on the CCE surface by dropping method. Then, OPPy and gold nanoparticels were electrochemically deposited on the surface of MWCNTs layer by layer. The surface morphology and electrochemical properties of this modified electrode was studied. Furthermore, the electrochemical behaviors of hydroquinone (HQ) and catechol (CC) were also investigated in 0.10 mol/L phosphate buffer solution (PBS) (pH 7.0) using this modified electrode. The results showed that the modified electrode had high electrochemical activity and good selectivity for the oxidation of HQ and CC. Under the optimal conditions, the linear range for the simultaneous determination of HQ and CC by first derivative voltammetry was from 2.0×10^-7 to 1.0×10^-4 mol/L, respectively. The detection limit for HQ and CC was 6.0×10^-8 and 8.0×10^-8 mol/L (S/N=3), respectively. The recoveries of HQ and CC in simulated water samples were 96.2%-99.8% and 96.0%-100.0%, resptively, which indicated the good practicability of the method.
- Gold nanoparticles,
- Overoxidized polypyrrole,
- Multi-walled carbon nanotubes,
- Hydroquinone,
- Catechol
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