Bismuth-based electrodes have been proved the most reliable replacement of highly toxic mercury for the anodic stripping (AS) and cathodic voltammetric determination of metal ions and organic compounds, respectively. Herein, we report for the first time on the implementation of two-dimensional (2D) bismuth, it called “bismuthene”, for the AS voltammetric determination of Pb(II) and Cd(II) ions. Bulk bismuth was exfoliated by a facile and fast shear-force liquid phase exfoliation method. Exfoliated bismuthene layers were characterized by means of SEM, EDX, Raman, FT-IR, electrochemical impedance spectroscopy and cyclic voltammetry. Bismuthene colloids were mixed with dispersions of few-layer graphene, which was used as supporting material in order to achieve the desired adherence of bismuthene films onto the surface of glassy carbon electrode (GCE) as well as an effective electrical communication between them and with the electrode surface. The optimum loading of bismuthene in the bismuthene/graphene composite (2D-Bi/Gra) was investigated, while other parameters such as the deposition time and deposition potential were also examined. Under selected conditions and for a 3 min preconcentration time, the limit of detection (S/N 3) of each target ion was 0.3 μg L⁻¹. 2D-Bi/Gra/GCEs were successfully applied to the determination of Pb and Cd in tap water samples in the presence of potassium hexacyanoferrate(II) for the alleviation of copper interference. Results suggest that 2D bismuthene/graphene modified electrodes offer great promise for the determination of sub-microgram per liter Pb and Cd and could contribute greatly in heavy metal ions and other organic compounds sensing applications.

铋电极已被证明是分别用于阳极溶出（AS）和金属伏安法测定金属离子和有机化合物的最可靠的高毒性汞替代方法。在此，我们首次报告了二维（2 D）铋，称为“铋”，用于AS伏安法测定Pb（II）和Cd（II）离子。通过简便，快速的剪切力液相剥离法剥离大块铋。通过SEM，EDX，拉曼，FT-IR，电化学阻抗谱和循环伏安法表征剥离的铋层。将铋胶体与几层石墨烯的分散体混合，该分散体用作支撑材料，以实现铋膜在玻璃碳电极（GCE）表面上的所需粘附性，以及它们之间以及与石墨烯电极之间的有效电连通。电极表面。铋/石墨烯复合材料中的最佳铋负载量（2 D-Bi / Gra）进行了研究，同时还检查了其他参数，例如沉积时间和沉积电位。在选定的条件下且经过3分钟的预浓缩时间，每个目标离子的检出限（S / N 3）为0.3μgL ^-1。2 D -Bi / Gra / GCEs在六氰合铁酸钾（II）的存在下成功地用于自来水样品中铅和镉的测定，以减轻铜的干扰。结果表明，二维铋/石墨烯修饰电极为测定每升Pb和Cd亚微克提供了广阔的前景，并可能在重金属离子和其他有机化合物的传感应用中做出巨大贡献。