Article ID Journal Published Year Pages File Type
186857 Electrochimica Acta 2013 10 Pages PDF
Abstract

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.

Graphical abstractA 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 full-size imageDownload as PowerPoint slide

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
Authors
, , , , , ,