Electrocatalytic activity of multi-walled carbon nanotubes modified electrode for p-benzenediol

The multi-walled carbon nanotubes (MWNT) modified electrode has been fabricated and its electrocatalytic activity for the oxidation of p-benzenediol was investigated. The effect of the type and acidity of electrolytes, the thickness of MWNT-modified layer, scan rates on the voltammetric behavior of p-benzenediol were also studied to acquire optimum conditions for detecting the p-benzenediol. In 0.1 mol/L phosphate buffer (pH 6.0), when differential pulse voltammetric method was used, there was an excellent linearity between oxidation current and concentration of p-benzenediol in the range of 5.0x10(-6)similar to1.1x10(-3) mol/L with a detection limit of 2.7x10(-6) mol/L. A lot of metal ions, ascorbic acid, and equimultiple phenol etc. did not interfere with the determination. The results revealed that the modified electrode could be used to the determination of p-benzenediol in imitative Waste water samples with good results.