Preparation of Graphene/Gold Nanoparticle Composite Film Modified Electrode and Its Application for Determination of Bisphenol A

A graphene-Au nanocomposite film(ERGO-Au) modified electrodewas prepared using coelectrodeposition technique. The morphology and electrochemical properties of this hybrid membrane were characterized by means of transmission electron microscopy (TEM) and cyclic voltammetry (CV), respectively. The electrocatalytic activity of ERGO-Au nanocomposite for the electrooxidation of bisphenol A (BPA) was also investigated. The cyclic voltammetry of bisphenol A on the modified electrode exhibits a well defined irreversible anodic peak. Under the optimum conditions, the oxidation peak current was proportional to bisphenol A concentration in the range from 3. 0x10(-8) mol/L to 1. 30x10(-5) mol/L. The limit of detection(LOD) is 1. 0 x 10(-8) mol/L(S/N =3). The proposed method was applied for detection of bisphenol A in tap water and plastic products. The described sensor was used for the determination of BPA in tap water and plastic products with good recovery, ranging from 96. 4% to 103. 5%.