A highly sensitive impedimetric sensor based on iron (III) porphyrin and thermally reduced graphene oxide for detection of Bisphenol A

[Display omitted] •Simple self-assembly method to fabricate a nanocomposite composed by a novel iron (III) porphyrin and a thermally reduced graphene oxide.•The Optical, the morphological and the electrochemical properties of the nanocomposite was highlighted.•The nanocomposite has been applied as electrochemical platform in BPA sensing.•The proof of concept of this sensor was demonstrated through the detection of the bisphenol A in real Milk samples. In this work, a non-covalent nanocomposite based on iron (III) porphyrin derivate (Fe(III)TMPP) and thermally reduced graphene oxide (TRGO) has been prepared. A membrane based on this nanocomposite TRGO/Fe(III)TMPP was deposited on Au electrode and has been characterized by ultraviolet–visible spectroscopy (UV–vis), scanning electron microscope (SEM) and electrochemical impedance spectroscopy (EIS). The results indicated that the TRGO exhibits a good interaction and a high conductivity with the Fe(III)TMPP molecules. This membrane has been applied as electrochemical platform for Bisphenol A (BPA) detection. It has showed a linear response towards these molecules with a high detection limit of 2.1 10−13 M. In addition, the proposed sensor has revealed a high selectivity and reproducibility. This sensor has been applied for the electrochemical detection of BPA in Milk sample with satisfying results.