TY - JOUR ID - 8825 TI - Electrochemical Investigation and Voltammetric Determination of Hydrazine Based on Organic Modifier and N-Doped Reduced Graphene Aerogel/ Molybdenum Oxide Nanorods Multilayer Nanocomposite Modified Glassy Carbon Electrode JO - Iranian Journal of Analytical Chemistry JA - IJAC LA - en SN - 2383-2207 AU - Mazloum-Ardakani, Mohammad AU - Arabi, Hamed AU - Alizadeh, Zahra AU - Haghshenas, Mahnoosh AU - Farbod, Fatemeh AU - HosseiniKhah, Sahar Saadat AU - Mirjalili, Bibifatemeh AD - Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran Y1 - 2022 PY - 2022 VL - 9 IS - 1 SP - 78 EP - 87 KW - electrochemical sensor KW - Graphene Aerogels KW - Nitrogen-Doped Aerogels KW - MoO2 KW - Hydrazine DO - 10.30473/ijac.2022.63882.1236 N2 - In this research, a novel modified glassy carbon electrode (GCE) was successfully fabricated with a tri-component nanocomposite consisting of 5-(3,4-dihydroxyphenyl)8,8-dimethyl-2-(methyl thio)-7,8,9,10-tetrahydropyrimido [4,5-b]quinolone-4,6(3H,5H)-dione (PQ23) and Nitrogen-doped reduced graphene oxide aerogel/molybdenum oxide nanorods (PQ23/N-doped-rGO/MoO2 /GCE) as sensing platform toward hydrazine (HDZ). The nanocomposite is characterized by MAP analysis, X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). Through electrochemical investigations, the electron transfer coefficient between PQ23 and the N-doped-rGO/MoO2 /GCE (glassy carbon electrode which was modified with reduce graphene oxide decorated by molybdenum oxide nanorods) and the apparent charge transfer rate constant, ks, and diffusion coefficient (D) were calculated. Electrochemical behavior and electrocatalytic activity of the nanocomposite modified GCE were studied by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV). Under the optimum experimental condition, the designed sensor exhibited high sensitivity and suitable selectivity for hydrazine oxidation, enabling the detection of hydrazine with a linear range of 25.0-1000.0 µM and a good detection limit (3σ) was 4.2 µM. The designed electrochemical sensor shows good repeatability, reproducibility, and acceptable stability with an RSD less than 3.2%. UR - https://ijac.journals.pnu.ac.ir/article_8825.html L1 - https://ijac.journals.pnu.ac.ir/article_8825_4eaf88c7cb16980458ad48549a29ce2c.pdf ER -