An Electrochemical Sensor Based on Functionalized Carbon Nanotube with Pyrazole Derivative for Determination of Hydrazine
نویسندگان
1 Department of Chemistry, Faculty of Science, Yazd University, Yazd, 89195-741, I.R. Iran
2 Department of Chemistry, Faculty of Science, Yazd University, Yazd, 89195-741, I.R. Iran
3 Department of Chemistry, Faculty of Science, Yazd University, Yazd, 89195-741, I.R. Iran
4 Department of Chemistry, Dehloran Branch, Islamic Azad University, Dehloran, Ilam, Iran
5 Department of Chemistry, Faculty of Science, Yazd University, Yazd, 89195-741, I.R. Iran
doi
10.30473/ijac.2019.45181.1140چکیده
In this work, we synthesis and application of functionalized carbon nanotubes (CNTs) In this work, we synthesis and application of functionalized carbon nanotubes (CNTs) with6-amino-4-(3,4-dihydroxyphenyl)-3-methyl-1,4-dihydropyrano[2,3-c]pyrazole-5 carbonitrile (pyrazole derivative (APC)) as sensing platform toward hydrazine (HZ). Electrochemical properties of functionalized carbon nanotubes composite (APC-CNT) were investigated by cyclic voltammetry, chronoamperometry and differential pulse voltammetry techniques. It was found that the APC-CNT composite exhibited a pair of redox peaks, which is due to the electron transfer between the APC and the glassy carbon electrode. The electrocatalytic properties of the APC-CNT composite for HZ oxidation was remarkably increased as compared to only CNTs. The kinetic parameters of the APC-CNT composite in the presence and absence of HZ was studied by electrochemical methods. The APC-CNT modified electrode revealed an excellent voltammetric response to oxidation of HZ with a wide linear range from 0.01 μM to 120.0 µM and limit of detection of 8.6 nM. Also, APC-CNT modified electrode shows high selectivity, good stability, reproducibility with a RSD less than 2.11%.
