Single-walled carbon nanotubes/Cu(OH)2 nanoparticles/Nafion composite modified glassy carbon electrode for selective detection of hydrazine

Hydrazine is most extensively used in industrial and agricultural application such as explosives, antioxidants, photographic developers, oxygen scavengers, insecticides, plant growth regulators and rocket fuels [1-4]. Also, hydrazine is very important in pharmacology because it has been recognized as a carcinogenic and hepatotoxic substance, which affects liver and brain glutathione. Therefore, a highly sensitive method is necessary for the reliable measurement of hydrazine concentration and the electrooxidation of hydrazine is a reaction of practical importance. In this work, the fabrication of an electrochemical sensor was reported for the electrocatalytic determination of hydrazine based on single-walled carbon nanotubes/ Cu(OH)2 nanoparticles/ Nafion supported on glassy carbon electrode. Uniform deposition of the nanocomposite was observed by field emission scanning electron microscopy. The best catalytic activity was obtained at the modified electrode due to shift of the oxidation peak to more negative values and highest current. The high performance electrocatalytic determination of hydrazine was performed by the amperometric i-t method. Linear calibration curves for hydrazine were obtained from 20 to 1000 μM and the detection limit is estimated to be 2.0 μM at a signal-to-noise ratio of 3.The results of the analysis suggest that the proposed method promises accurate results and could be employed for the routine determination of hydrazine.