▎ 摘　　要

Gold nanoparticles (AuNPs)-polyvinylpyrrolidone (PVP)-graphene (Gr) nanohybrids were prepared by a facile one-pot green strategy. The obtained Au-PVP-Gr composites were characterized by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. Then, a novel electrochemical sensor for highly sensitive and selective detection of tert-butylhydroquinone (TBHQ) is proposed based on cetyltrimethyl-ammonium bromide (CTAB) and Au-PVP-Gr modified glassy carbon electrode (GCE). Due to the synergistic effect of CTAB and Au-PVP-Gr, the developed sensor displays a wide linear range from 0.02 to 0.1 and 0.1 to 100.0 mu M. A low detection limit of 0.009 mu M was observed. Further, the sensitivity and selectivity of PVP-CTAB/Au-PVP-Gr/GCE was demonstrated by its practical application in the determination of TBHQ in real samples.