Preparation of Au nanoparticles via anodic stripping of underpotential deposition-Cu in bulk electrodeposition-Au for high-performance electrochemical sensing of bisphenol A

Abstract

Bisphenol A is one of the most widely used industrial compound, has been intense concern over the years as its potential hazard to the human endocrine system and environment. This work reported a new bisphenol A electrochemical sensor prepared by convenient and controllable Cu-underpotential/Au-bulk co-electrodeposition on a glassy carbon electrode (GCE) modified with multiwalled carbon nanotubes, followed by electrochemical anodic stripping of Cu of underpotential deposition (UPD) and then yields a Au nanoparticles/multiwalled carbon nanotubes composite electrocatalyst modified electrode (AuCu-UPD/MWCNTs/GCE). The AuCu-UPD/MWCNTs/GCE has high electrocatalytic and high-performance sensing for bisphenol A (BPA). Under optimal conditions, the modified elctrode showed a two segments linear response from 0.01 to 1 µM and 1 to 20 µM with a limit of detection (LOD) of 2.43 nM based on differential pulse voltammetry (DPV). Determination of bisphenol A in real water samples on the AuCu-UPD/MWCNTs/GCE yields satisfactory results. The proposed electrochemical sensor can be promising for the development of simple, low-cost water quality monitoring system for detection of BPA in ambient water samples.