Cuo Nanorods Decorated Hemin-Graphene with Enhanced Peroxidase-Mimic Performance for Colorimetric Determination of Bisphenol F

Abstract

A rapid and facile colorimetric sensor based on CuO nanorods decorated hemin functional graphene nanocomposite   (CuO/H-Gr) for determination of Bisphenol F (BPF) was successfully developed. The as-prepared CuO/H-Gr showed superior peroxidase-mimic property than that of individual H-Gr and CuO, which attributed to their synergistic catalytic effect. It could catalyze chromogenic substrate 3,3',5,5'-tetramethylbenzidine (TMB) by H 2 O 2 to form blue-colored products. In the presence of BPF, the catalytic performance of CuO/H-Gr was obviously decreased along with the fading of blue color. Based on this, BPF was sensitively detected with a linear range of 0.100 - 32.0 ng·mL -1 and a detection limit as low as 0.100 ng·mL -1 . This colorimetric sensor was carried out to evaluate BPF concentration in real water samples, which exhibited satisfied recoveries from 97.5% to 99.6%. The results illustrated that the CuO/H-Gr possesses excellent potential for application in environmental monitoring.

Keywords: CuO, Hemin-graphene, Peroxidase-mimic property, Colorimetric sensor, Bisphenol F