Electrochemical determination of quercetin based on porous aromatic frameworks supported Au nanoparticles

Abstract

Gold nanoparticles (Au NPs) were decorated on porous aromatic framework (Au-PAF-6) using a simple reduction method. The prepared Au-PAF-6 material was characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and transmission electron microscopy (TEM), which clearly illustrated that Au NPs were dispersed with an average particle size of 15.1 nm on the PAF-6 surface. The obtained Au-PAF-6 offered a remarkable analytical performance in the electrocatalytic oxidation of quercetin (QC) at reduced potential. The modified Au-PAF-6 electrode exhibited a good differential pulse voltammetric response in the QC concentration of 1 x 10 (12) - 6 x 10 (10) M with the detection limit of 2 x 10 (13) M. The designed sensor platform was also implemented directly to determine the QC in apple juice and green tea samples. Reliable recovery (98.2-99.4%) showed that Au-PAF-6 was highly stable and reproducible, and had good anti-interference properties. (C) 2016 Elsevier Ltd. All rights reserved.