کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4766860 1424114 2017 47 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical detection of Epinephrine using Polyaniline nanocomposite films doped with TiO2 and RuO2 Nanoparticles on Multi-walled Carbon Nanotube
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrochemical detection of Epinephrine using Polyaniline nanocomposite films doped with TiO2 and RuO2 Nanoparticles on Multi-walled Carbon Nanotube
چکیده انگلیسی
Electrochemical properties of functionalized MWCNT/polyaniline doped with metal oxide (TiO2, RuO2) nanoparticles were explored. Successful synthesis of MWCNT, TiO2, RuO2, PANI, MWCNT-PANI-TiO2, and MWCNT-PANI-RuO2 nano materials were confirmed using suitable characterization techniques. Successful modification of gold (Au) electrode with these nanoparticles was confirmed using electrochemical techniques such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy. Au-MWCNT-PANI-TiO2 and Au-MWCNT-PANI-RuO2 gave the best electron transport properties towards the oxidation of epinephrine (EP) compared with other electrodes investigated. The Tafel values 0.448 and 0.442 V/decade for Au-MWCNT-PANI-TiO2 and Au-MWCNT-PANI-RuO2 electrodes respectively in (EP) suggest adsorption due to analyte oxidation intermediates products. The linear calibration plot was obtained for EP at concentrations range 4.9 to 76.9 μM. The limits of detection of EP were estimated to be 0.16 and 0.18 μM for Au-MWCNT-PANI-TiO2 and Au-MWCNT-PANI-RuO2 electrodes respectively. The interference study using DPV showed clear peak separation for amino acid (AA) and EP. Therefore, the modified electrodes can selectively detect epinephrine without interference from ascorbic acid signal. The analytical performance of the fabricated sensors has been evaluated for detection of epinephrine (EP) in a pharmaceutical sample with satisfactory results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 243, 20 July 2017, Pages 331-348
نویسندگان
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