کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
191490 459722 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modification of electrodes with nanostructured functionalized thiadiazole polymer film and its application to the determination of ascorbic acid
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Modification of electrodes with nanostructured functionalized thiadiazole polymer film and its application to the determination of ascorbic acid
چکیده انگلیسی

We report the electropolymerization of 2-amino-1,3,4-thiadiazole (ATD) on glassy carbon (GC) and indium tin oxide (ITO) electrodes in 0.10 M H2SO4. The electropolymerized ATD (p-ATD) film was characterized by cyclic voltammetry, attenuated total reflectance (ATR)-FT-IR spectroscopy, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The AFM image showed that the p-ATD formed a spherical-like structure with a thickness of 25 nm. XPS of the p-ATD film showed binding energies at 398.7, 400.3 and 401.3 eV in the N 1s region corresponding to –N, –NH– and –N+H–, respectively, and at 285.5 and 287.0 eV in the C 1s region corresponding to C–N and CN, respectively. The appearance of binding energies at 285.5 and 287.0 eV confirmed that the p-ATD film proceeded via C–N and CN linkages and not via C–C or CC linkages. The p-ATD film deposited on the GC electrode was successfully used for the determination of ascorbic acid (AA) at physiological pH. The amperometric current was increased linearly from 7.5 × 10−8 to 2.0 × 10−5, and the detection limit was found to be 0.28 nM (S/N = 3).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 55, Issue 1, 15 December 2009, Pages 183–189
نویسندگان
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