کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
186857 459624 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancing characteristics of a composite film by combination of vanadium-substituted molybdophosphate and platinum nanoparticles for an electrochemical sensor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Enhancing characteristics of a composite film by combination of vanadium-substituted molybdophosphate and platinum nanoparticles for an electrochemical sensor
چکیده انگلیسی

A composite film based on a vanadium-substituted molybdophosphate H6[PMo9V3O40] (PMo9V3) decorated by platinum nanoparticles (Pt) has been prepared by the layer-by-layer self-assembly method. The growth process of the composite film was monitored by UV–vis spectroscopy, and the elemental composition and surface morphology were surveyed by X-ray photoelectron spectra (XPS) and atomic force microscopy (AFM), respectively. Comparative experiments revealed that the electrocatalytic efficiency and amperometric response of this composite film toward oxidation of dopamine at physiological conditions were markedly enhanced by synergistic contributions of PMo9V3 and Pt. The sensing performance for dopamine detection was investigated in detail. At physiological conditions, the composite film exhibited high sensitivity of 1.2 μM/μA dopamine, fast response time (<1 s), low detection limit (∼1.3 × 10−7 M), and a wide linear range from 4.2 × 10−7 to 1.3 × 10−3 M toward amperometric sensing of dopamine, as well as no interference from the common interfering species such as ascorbic acid, glucose, uric acid and l-cysteine.

A proposed electrochemical sensor has highly selective, sensitive, stable and fast determination of dopamine, as well as no interference from the common interfering species at an applied potential of 0.8 V.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 108, 1 October 2013, Pages 717–726
نویسندگان
, , , , , ,