Zhang Liang, Hu Shaohua, Su Jingtao, Meng Minfeng, Liu Kaiwen, Miao Yuqing, An Yarui, Gu Yingying
School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai, 200093, PR China.
School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai, 200093, PR China.
Talanta. 2025 Aug 17;297(Pt B):128717. doi: 10.1016/j.talanta.2025.128717.
Heavy metal contamination poses a significant threat to both human health and aquatic ecosystems, highlighting the urgent need for its effective monitoring. Bismuthene is a two-dimensional nanostructured material derived from the environmentally friendly and non-toxic element bismuth, offering significant potential for sustainable electrocatalytic applications. In this study, a facile synthesis method for bismuthene nanosheets and their integration with biomass-derived carbon to form BieneNS@C composites is presented. The successful synthesis of BieneNS@C was confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The presence of the layered hexagonal structure of BieneNS was confirmed by transmission electron microscopy (TEM) and atomic force microscopy (AFM). The excellent electrical conductivity and enhanced current response toward Cd(II) were evaluated using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV). Moreover, the interaction mechanism between Cd(II) and BieneNS@C was elucidated by Fourier transform infrared (FTIR) spectroscopy. The composites were employed to modify glassy carbon electrodes (GCE) for sensitive detection of Cd(II) in aqueous solutions. The optimized sensor demonstrated excellent analytical performance, showing a linear response from 0 to 150 μg L with a detection limit of 0.2 μg L. The BieneNS@C/GCE exhibited outstanding selectivity, stability, and reproducibility. Practical application in tap water analysis achieved recovery rates of 104.8 %-105.3 %, validating the reliability of the method. These results demonstrate that the BieneNS@C-based electrochemical sensor provides a simple, low-cost, and highly sensitive platform for Cd(II) detection, with potential for real-sample analysis.
重金属污染对人类健康和水生生态系统都构成了重大威胁，凸显了对其进行有效监测的迫切需求。铋烯是一种由环境友好且无毒的元素铋衍生而来的二维纳米结构材料，在可持续电催化应用方面具有巨大潜力。在本研究中，提出了一种简便的铋烯纳米片合成方法及其与生物质衍生碳集成以形成BieneNS@C复合材料的方法。通过X射线衍射（XRD）和X射线光电子能谱（XPS）证实了BieneNS@C的成功合成。通过透射电子显微镜（TEM）和原子力显微镜（AFM）证实了BieneNS的层状六边形结构的存在。使用电化学阻抗谱（EIS）、循环伏安法（CV）和差分脉冲伏安法（DPV）评估了其优异的导电性和对Cd(II)增强的电流响应。此外，通过傅里叶变换红外（FTIR）光谱阐明了Cd(II)与BieneNS@C之间的相互作用机制。将该复合材料用于修饰玻碳电极（GCE）以灵敏检测水溶液中的Cd(II)。优化后的传感器表现出优异的分析性能，在0至150μg/L范围内呈线性响应，检测限为0.2μg/L。BieneNS@C/GCE表现出出色的选择性、稳定性和重现性。在自来水分析中的实际应用回收率为104.8%-105.3%，验证了该方法的可靠性。这些结果表明，基于BieneNS@C的电化学传感器为Cd(II)检测提供了一个简单、低成本且高灵敏度的平台，具有实际样品分析的潜力。
