AuNp@MOF composite as electrochemical material for determination of bisphenol A and its oxidation behavior study†
A composite material based on a metal organic framework (MOF), nanowhisker of Al2O3 silanized with (3-aminopropyl)triethoxysilane (APTES) and gold nanoparticles (AuNp) was synthesized and characterized. This material was used to prepare an electrode based in carbon paste (CPE) and applied as a sensor for the determination of bisphenol A (BPA). The electrochemical characterizations and behaviour of the electrode containing the AuNp@MOF composite exhibited a 2.3 higher electroactive surface area, when compared with just CPE. Using differential pulse voltammetry (DPV), it can be noted that the presence of AuNp plays an important role in enhancing the analyte signal detection of BPA 2.5-fold. A linear increase in emphasizing the response as a function of analyte concentration is demonstrated. In this account, we believe that this composite may be applied in analyticals methods for the determination of BPA and others endocrine disruptors.