▎ 摘　　要

Graphene sheets (GSs) are first easily prepared via one-step solvent exfoliation of graphite powder in N-methyl-2-pyrrolidone (NMP) and then hybridized with Ni(OH)(2) microparticles. The resulting insoluble GS-Ni(OH)(2) hybrid is readily dispersed in water in the presence of surfactant hexadecyltrimethylammonium bromide (CTAB). Compared with the bare glassy carbon electrode (GCE), CTAB, pristine GS, Ni(OH)(2), and GS-Ni(OH)(2) composite modified GCEs show enhanced oxidation signal for bisphenol A (BPA). Based on the cooperative enhancement effect of the solvent-exfoliated graphene-Ni(OH)(2) hybrid and CTAB, a novel electrochemical sensor with high sensitivity is developed for the detection of BPA. Under the optimal conditions, the detection limit (S/N = 3) is estimated to be as low as 5.0 nM. In the end, the fabricated electrochemical sensor is successfully used to determine the content of BPA in real water samples.