سنتز وخصوصیت سنجی کامپوزیت Fe3O4 / پلی آنیلین میکرولوله به عنوان حسگر الکتروشیمیایی برای تشخیص کاتیونهای سرب (II)

نوع مقاله : مقاله پژوهشی کامل

نویسنده

گروه شیمی، دانشکده علوم، دانشگاه فرهنگیان، تهران، ایران

چکیده

در کار حاضر کامپوزیت Fe3O4/پلی آنیلین میکرو لوله سنتز شد وبه عنوان یک ماده حساس برای تشخیص کاتیون سرب (II) جهت بهبود عملکرد الکترود کربن شیشه‌ای) (GCE مورد استفاده قرارگرفت. نتایج حاصل از میکروسکوپ الکترونی و پراش اشعه ایکس به ترتیب ریخت میکرو لوله های پلی آنیلین و حضور نانو ذرات Fe3O4را تأیید نمود. از طرف دیگر، نتایج حاصل از طیف سنجی امپدانس الکتروشیمیایی، کاهش مقاومت الکتریکی الکترود بهبود یافته با کامپوزیت Fe3O4/ پلی آنیلین میکرو لوله به دلیل حضور میکرو لوله های پلی آنیلین را تأیید نمود. نتایج حاصل از طیف سنجی امپدانس یک افزایش در خواص خازنی الکترود بهبود یافته در مقایسه با الکترود کربن شیشه‌ای را تأیید نمود که نشان دهندهء افزایش سطح قابل دسترس الکترود بهبود یافته بود. الکترود حاصل یک انتخاب پذیری بالا، حساسیتnM-1 .µA. cm-2 452/1 به تشخیص کاتیون سرب (II) و حد تشخیص nM 027/0 را با توجه به نتایج آزمایش ها نشان داد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Synthesis and characterization of Fe3O4/Polyaniline microtube composite as electrochemical sensor for Lead (II) detection

نویسنده [English]

  • Mohammad Reza Mahmoudian
Department of Chemistry, Faculty of Science University of Farhangian, Tehran, Iran
چکیده [English]

In the present study, Fe3O4/polyaniline micro-tube nanocomposite (Fe3O4/PAn MT-NCs) was synthesized and used as a sensitive material for the detection of lead (II) cation to enhance the performance of glassy carbon electrode (GCE). The results of the scanning electron microscope (SEM) and X-Ray diffraction (XRD) confirmed the morphology of PAn MTs and the presence of Fe3O4 nanoparticles respectively. The electrochemical impedance spectroscopy (EIS) results showed a decrease in the electron transfer resistance in the Fe3O4/PAn MT-NCs/GCE due to the presence of PAn MTs. The increase in the available surface area of the Fe3O4 / PAn MT-NCs/GCE in comparison with bare GCE was confirmed by the increase of the capacitive properties in the EIS results. The improved GCE showed high selectivity, sensitivity 1.452 µA.nM-1.cm-2 to the detection of lead (II) cation, and a limitation of detection (LOD) 0.027 nM.

کلیدواژه‌ها [English]

  • Lead Cation
  • Modified Electrode
  • Nanoparticles
  • Micro Tube
  • Voltammetry
  • Fe3O4/Polyaniline

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پژوهش سیستم های بس ذره ای
دوره 12، شماره 1 - شماره پیاپی 32
بهار 1401
خرداد 1401
صفحه 101-114

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سابقه مقاله

  • تاریخ دریافت: 05 مهر 1400
  • تاریخ بازنگری: 12 دی 1400
  • تاریخ پذیرش: 08 اسفند 1400

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