کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6661504 | 1426550 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Glassy carbon electrode modified with a nanocomposite of multi-walled carbon nanotube decorated with Ag nanoparticles for electrochemical investigation of Isoxsuprine
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A highly sensitive voltammetric sensor is prepared using multi-walled carbon nanotube decorated with silver nanoparticles (AgNPs-MWCNTs) and is applied for the determination of Isoxsuprine (ISOX). The characterization of the prepared nanocomposite is performed using energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), atomic force microscopy (AFM), transmission electron microscope (TEM), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry techniques. The electrochemical behavior of ISOX is studied on the surface of the modified electrode by linear sweep and cyclic voltammetry methods. Under the optimized conditions such as pH of the supporting electrolyte, accumulation time and amount of the casted modifier, a significant electrochemical improvement is observed toward the electro-oxidation of ISOX on the surface of AgNPs-MWCNTs glassy carbon electrode (AgNPs-MWCNTs/GCE), in comparison to MWCNTs/GCE and bare GCE. At the surface of the modified electrode two oxidation peaks are observed for ISOX at potentials around 0.63â¯V (peak I) and 0.82â¯V (peak II) in BR buffer solution of pHâ¯7.0. By using two anodic peaks of ISOX, two linear dynamic ranges of 0.04-5.0â¯Î¼molâ¯Lâ1 and 0.2-5.0â¯Î¼molâ¯Lâ1 with detection limits of 12â¯nmolâ¯Lâ1 and 60â¯nmolâ¯Lâ1are obtained for peaks I and II, respectively. The modified electrode showed a simple fabrication procedure, high sensitivity, stability and good reproducibility in response to ISOX. The AgNPs-MWCNTs/GCE is successfully applied for the accurate determination of trace amounts of ISOX in pharmaceutical and clinical preparations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 825, 15 September 2018, Pages 30-39
Journal: Journal of Electroanalytical Chemistry - Volume 825, 15 September 2018, Pages 30-39
نویسندگان
Saeed Shahrokhian, Mohammad Hafezi-Kahnamouei,