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

Mohammad Mazloum-Ardakani; Hamed Arabi; Zahra Alizadeh; Mahnoosh Haghshenas; Fatemeh Farbod; Sahar Saadat HosseiniKhah; Bibifatemeh Mirjalili

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

محل انتشار: دوفصلنامه ایرانی شیمی تجزیه، دوره: 9، شماره: 1

سال انتشار: 1401

نوع سند: مقاله ژورنالی

زبان: انگلیسی

مشاهده: 143

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https://civilica.com/doc/1487618

شناسه ملی سند علمی:

JR_IJAC-9-1_008

تاریخ نمایه سازی: 1 مرداد 1401

چکیده مقاله:

In this research, a novel modified glassy carbon electrode (GCE) was successfully fabricated with a tri-component nanocomposite consisting of ۵-(۳,۴-dihydroxyphenyl)۸,۸-dimethyl-۲-(methyl thio)-۷,۸,۹,۱۰-tetrahydropyrimido [۴,۵-b]quinolone-۴,۶(۳H,۵H)-dione (PQ۲۳) and Nitrogen-doped reduced graphene oxide aerogel/molybdenum oxide nanorods (PQ۲۳/N-doped-rGO/MoO۲ /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 PQ۲۳ and the N-doped-rGO/MoO۲ /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 ۲۵.۰-۱۰۰۰.۰ µM and a good detection limit (۳σ) was ۴.۲ µM. The designed electrochemical sensor shows good repeatability, reproducibility, and acceptable stability with an RSD less than ۳.۲%.

کلیدواژه ها:

electrochemical sensor ، Graphene Aerogels ، Nitrogen-Doped Aerogels ، MoO۲ ، Hydrazine

نویسندگان

Mohammad Mazloum-Ardakani