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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 | ||
| Iranian Journal of Analytical Chemistry | ||
| دوره 9، شماره 1 - شماره پیاپی 17، خرداد 2022، صفحه 78-87 اصل مقاله (1.24 M) | ||
| نوع مقاله: Full research article | ||
| شناسه دیجیتال (DOI): 10.30473/ijac.2022.63882.1236 | ||
| نویسندگان | ||
| Mohammad Mazloum-Ardakani* ؛ Hamed Arabi؛ Zahra Alizadeh؛ Mahnoosh Haghshenas؛ Fatemeh Farbod؛ Sahar Saadat HosseiniKhah؛ Bibifatemeh Mirjalili | ||
| Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran | ||
| چکیده | ||
| 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%. | ||
| کلیدواژهها | ||
| Electrochemical Sensor؛ Graphene Aerogels؛ Nitrogen-Doped Aerogels؛ MoO2؛ Hydrazine | ||
| عنوان مقاله [English] | ||
| بررسی الکتروشیمیایی و اندازهگیری ولتامتری هیدارازین با استفاده از الکترود کربن شیشهای اصلاح شده | ||
| نویسندگان [English] | ||
| محمد مظلوم اردکانی؛ حامد اعرابی اردکانی؛ زهرا علیزاده؛ مهنوش حق شناس؛ فاطمه فربد؛ سارا سادات حسینی خواه؛ بی بی فاطمه میرجلیلی | ||
| بخش شیمی، دانشکده علوم، دانشگاه یزد، یزد، ایران | ||
| چکیده [English] | ||
| در این مطالعه، برای سنجش هیدرازین یک حسگر الکتروشیمیایی با استفاده از الکترود کربن شیشه-ای اصلاح شده برپایه اصلاحگر آلی 5-(3و4-دیهیدروکسیفنیل)-8و8-دیمتیل-2-(متیلتیو)-7و8و9و10-تتراهیدروپیریمیدو]4و5-[bکینولون-4و6(3H,5H)-دیون (PQ23) و نانوکامپوزیت آیروژل گرافن اکسید کاهش یافته آلاییده شده با نیتروژن/نانو میلههای مولیبدن اکسید طراحی شد. برای بررسی ساختار وترکیب نانوذرات سنتزی از SEM، XRD، EDS و MAP استفاده شد. الکترود اصلاح شده با طیفبینی امپدانس الکتروشیمیایی (EIS) مورد بررسی قرار گرفت و بهبود انتقال الکترون به دلیل رسانایی خوب نانوکامپوزیت تایید شد. با استفاده از ولتامتری چرخهای اکسایش هیدرازین مورد بررسی قرار گرفت و کاهش اضافه پتانسیل و افزایش جریان در سطح الکترود اصلاح شده مشاهده و همچنین ضریب انتقال اصلاحگر برای اکسایش هیدرازین 5/0 محاسبه شد. با استفاده از ولتامتری تپی تفاضلی غلظتهای مختلف از هیدرازین در سطح الکترود اصلاح شده بررسی و حد تشخیص μM 2/4 و گستره خطیμM 103×0/1-0/25 برای روش پیشنهادی گزارش شد. | ||
| کلیدواژهها [English] | ||
| حسگر الکتروشیمیایی. الکترود کربن شیشهای. هیدرازین. نانوکامپوزیت | ||
| مراجع | ||
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