The development of a electrochemical sensor based in a composite of oxidated graphene, metallic nanoparticles (Au or Ag) and mesoporous sílica is proposed to be used for determining bisphenol-A in environmental samples (water from different creeks in the São Carlos region). The composite will be initially characterized by transmission spectroscopy to determine the size and distribution of nanoparticles and graphene leafs, Raman spectroscopy for graphene purity analysis (bands D and G), scanning eléctron microscopy and electrochemical techniques for characterization of the perfect functioning of the sensor. The differential pulse voltammetry will be then applied for determining the bisphenol-A concentrations in a buffer solution of pH approximately 7. For comparison, the HPLC with liquid phase extraction and UV diode array detection methodology will be used. Several experimental parameters will be optimized. Finally, the electrochemical sensor will be used in the quantification of the endocrine interferente in natural Waters, sampled in a creek in São Carlos county with low contamination of domestic efluentes.
News published in Agência FAPESP Newsletter about the scholarship: