Abstract
We have synthesized graphene dispersed carbon nanotube and Iron phthalocyanine composite (GO- CNT-FePc) and successfully employed it for the electrochemical determination of hydrazine. The synthesized composite has been well characterized by scanning electron microscope (SEM), transmission emission microscopy (TEM) and energy-dispersive X-ray (EDX) spectroscopy. GO- CNT-FePc modified glassy carbon electrode (GCE) was prepared and its electrochemical behavior has been accessed by cyclic voltammetry. GO-CNT-FePc modified GCE exhibited highly enhanced hydrazine oxidation peak current at appreciably lower potential of +0.18 V. Therefore, the prepared GO-CNT-FePc modified GCE was demonstrated for the sensing of hydrazine by amperometry. The constructed GO-CNT-FePc modified electrode detects hydrazine in a wide linear range of 5 × 10-7 - 8.35 × 10-5 M, with very low detection limit of 9.3×10-8 M. The sensor exhibited an acceptable repeatability and reproducibility. The excellent recoveries achieved for the hydrazine determination in various water samples reveal the promising practicality of the sensor.