Estudio de electrodos modificados con grafeno y nanopartículas de oro para la detección de arsénico en agua.

Abstract

The present investigation studies the use of modified electrodes with Gold nanoparticles and graphene, with and without the presence of an organic film of 4’4 Biphenyl Di tiol (Mo), for arsenic (As) detection through anodic stripping voltammetry (ASV), the nanostructures were obtain through chemical techniques; liquid exfoliation and electrochemical exfoliation. The nanostructures were characterized through spectroscopy techniques such as: Ultraviolet–visible spectroscopy (UV-Vis), RAMAN spectroscopy and microscopy techniques such as atomic force microscopy (AFM). The electrodes were modified using Self assembled techniques both Mo and nanostructures, the electrodes’ morphology was studied using AFM. The electrochemical properties of modified electrodes were studied using cyclic voltammetry, the electrodes with the best modifications were the following: Au-AuNPs; Au-Graphene; Au-Mo-AuNPs: Au-Mo-Graphene, this modifications were used for arsenic detection through ASV. The results shows that only the use of AuNPS, favor the detection of As.