Amperometric Determination of Hydrazine Using Au Nanoparticle Incorporated CMK-3 Modified Glassy Carbon Electrode

Abstract

Abstract In this work, ordered mesoporous carbon (CMK-3) was synthesized using nano-casting method, in which Au nanoparticles were incorporated using citrate-reduction method. It was characterized using various physicochemical techniques like XRD, Raman, HRSEM, BET, and HRTEM. The synthesized material was utilized as an electrocatalyst for the electrochemical determination of hydrazine (HZ). From the cyclic voltametric studies, it is understood that the bare as well as CMK-3 modified glassy carbon electrodes fail to produce signal against hydrazine. On the contrary, Au nanoparticle incorporated CMK-3 modified glassy carbon electrode (AuNP-CMK-3/GCE) senses the analyte at the applied overpotential of 0.22 V. Using the amperometric measurements, it is concluded that the electrode is able to produce signal against the target analyte in the concentration range of 3 – 27 µM with the R2 value of 0.9964. Further, sensitivity and limit of detection (LOD) of the electrode against HZ were found as 0.00289 µA/µM and 1 µM, respectively. The selectivity of the electrode was examined in the presence of other interferrents, which revealed that the electrode is selective to HZ. The real-time applicability of the electrode was ascertained in the water samples collected from pond and water fountain.