نوع مقاله : مقاله پژوهشی کامل
نویسندگان
- 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
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.
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