摘要

Herein, graphene-palladium nanoparticles (PdNP-GR) were synthesized and dispersed in polyvinyl alcohol (PVA) to obtain a PdNP-GR/PVA composite. The composite was used to establish a novel Ru(bpy)(3)(2+)-based electrochemiluminescence (ECL) sensing platform for the sensitive detection of bisphenol A (BPA). The electrochemical and ECL responses of BPA on the PdNP-GR/PVA-modified glassy carbon electrode (GCE) were greatly enhanced as compared to those on PVA/GCE or bare GCE. It was found that PdNPGR exhibited good electron transfer ability and catalytic activity. In addition, the ECL signal on the Ru(bpy) 3 2+/PdNP-GR/PVA composite-modified electrode was greatly amplified by BPA. Under optimum conditions, a good linear relationship was obtained for the ECL intensity versus the logarithm of BPA concentration in the range of 1.0 x 10(-10) to 1.0 x 10(-5) M, with the detection limit of 2.5 x 10(-11) M (S/N = 3). The fabricated sensing platform was successfully applied for the detection of BPA in baby bottle, and relatively satisfactory recoveries were obtained.