Nitin R. Dighore; Suresh T. Gaikwad; Anjali S. Rajbhoj
Abstract
The fabrication of an electrochemical sensor based on polypyrrole-Pd nanocomposites modified gold electrode (PPy-Pd-AuE) and its electrodetection of ascorbic acid is described. The PPy-Pd nanocomposites were synthesized by chemical method and characterized by different techniques. The Pd nanoparticles ...
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The fabrication of an electrochemical sensor based on polypyrrole-Pd nanocomposites modified gold electrode (PPy-Pd-AuE) and its electrodetection of ascorbic acid is described. The PPy-Pd nanocomposites were synthesized by chemical method and characterized by different techniques. The Pd nanoparticles incorporated with PPy were confirmed by x-ray diffraction, scanning electron microscope, elemental dispersive spectroscopy and transmission electron microscopy analysis. The electrochemical behavior of polypyrrole-Pd nanocomposites towards the electro catalytic oxidation of ascorbic acid was investigated by cyclic voltammetry, differential pulse voltammetry and square wave voltammetry. The observed cyclic voltammetry, differential pulse voltammetry and square wave voltammetry response depended linearly on concentration of ascorbic acid in the range of 100-1000 mM with correlation coefficients of R 2 =0.977, R 2 =0.980, R 2 = 0.990 and sensitivity 7.96 mA/mM.cm 2 , 0.70 mA/mM.cm 2 and 2.10 mA/mM.cm 2 respectively. The reproducibility of PPy-Pd-AuE electrode from CV, DPV and SWV were found to be 3.9%, 4.69% and 2.98 % respectively. These results indicate the PPy-Pd-AuE exhibited excellent platform and could be used for electrochemical determination of ascorbic acid.
Nitin R. Dighore; Suresh T. Gaikwad; Anjali S. Rajbhoj
Abstract
A voltammetric sensor was developed for detection of glucose by using cyclic voltammetry (CV). The sensing platform was Polypyrrole-Pt nanocomposites on Platinum electrode (PPy-Pt-PtE). PPy-Pt was synthesized by chemical method, using FeCl3 oxidant. XRD, SEM and TEM results showed that PPy doped with ...
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A voltammetric sensor was developed for detection of glucose by using cyclic voltammetry (CV). The sensing platform was Polypyrrole-Pt nanocomposites on Platinum electrode (PPy-Pt-PtE). PPy-Pt was synthesized by chemical method, using FeCl3 oxidant. XRD, SEM and TEM results showed that PPy doped with Pt were highly porous, nanocrystalline composites. The PPy-Pt-PtE modified electrode observed reversible behavior with ferricyanide system which had about 2.05 times more surface area and exhibited higher currents for glucose oxidation compared to bare PtE. Glucose was sensed in the range of 100mM to 1000 mM from the linear regression plotted R 2 = 0.990 and R 2 = 0.994 the sensitivity was found to be 0.047 mA/mM~cm 2 and 0.0445 mA/mM~cm 2 . These results indicate that PPy-Pt-PtE exhibited good platform and could be used for voltammetric determination of glucose.