Single Step Synthesis of Gold Nanoparticles Decorated Graphene Oxide Using Aniline as Reducing Agent and Study its Application on Elecrocatalytic Detection of Tryptophan

Abstract:

A single step method for the synthesis of gold nanoparticles decorated graphene oxide nanocomposite using aniline as reducing agent has been developed. The composite was characterized using FE-SEM, UV-Vis and FT-IR and XRD analysis. The electron transfer behavior of the modified electrodes was investigated in a redox probe using cyclic voltammetry. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were employed to evaluate the electrochemical properties of AuNPs/GO/GCE towards the electrochemical oxidation of tryptophan. A calibration graph was constructed by plotting the concentration of tryptophan against the peak current. Under the optimum experimental conditions, the oxidation peak currents were measured by varying the tryptophan concentrations. The resulting sensor displays an excellent repeatability and long-term stability.

• Periodical: Advanced Materials Research (Volume 938)
• Pages: 182-191
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.938.182
• Online since: June 2014
• Authors: P. Divya, A. Sudarvizhi, K. Pandian*
• Keywords: Electrochemical Sensor, Gold Nanoparticle, Graphene Oxide, Tryptophan

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