Abstract The preparation and application of biomass-derived porous carbon (BPC) have aroused intensive attentions due to the advantages of eco-friendliness, abundant resources, and low cost. Herein banyan leaves derived BPC was prepared by calcination technique with rich three-dimensional interconnected frameworks. Furthermore, Au nanoflakes (AuNFs) were decorated on BPC by hydrothermal method to obtain AuNFs-BPC nanocomposite. The morphology, structure and composition of AuNFs-BPC were characterized by SEM, XRD, Raman and XPS techniques. AuNFs-BPC was modified on glassy carbon electrode surface to construct a functional sensing platform for the investigation on electrochemical behaviors of luteolin. Obvious enhanced electrochemical signals of luteolin could be observed, which was bigger than that on bare electrode. The electrode reaction mechanism was studied with the electron transfer coefficient and standard heterogeneous reaction rate constant calculated as 0.51 and 1.99 s−1. Consequently, an AuNFs-BPC modified electrode based voltammetric sensor for luteolin determination was constructed with a low detection limit of 0.07 μmol/L (3S0/S). This novel sensing platform displays great potential for practical and reliable luteolin determination in Duyiwei capsules and human urine samples.

中文翻译：

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金纳米片装饰生物质衍生多孔碳的合成及其在电化学木犀草素传感中的应用

摘要 生物质衍生多孔碳（BPC）的制备和应用因其环境友好、资源丰富、成本低等优点而受到广泛关注。在此，榕树叶衍生的 BPC 是通过煅烧技术制备的，具有丰富的三维互连框架。此外，通过水热法在BPC上装饰Au纳米薄片（AuNFs）以获得AuNFs-BPC纳米复合材料。AuNFs-BPC 的形貌、结构和组成通过 SEM、XRD、拉曼和 XPS 技术表征。在玻碳电极表面修饰 AuNFs-BPC，构建功能传感平台，用于研究木犀草素的电化学行为。可以观察到木犀草素明显增强的电化学信号，比裸电极上的要大。研究了电极反应机理，电子转移系数和标准非均相反应速率常数计算为 0.51 和 1.99 s-1。因此，构建了用于木犀草素测定的基于 AuNFs-BPC 修饰电极的伏安传感器，其低检测限为 0.07 μmol/L (3SO/S)。这种新型传感平台在都一味胶囊和人体尿液样本中显示出实用和可靠的木犀草素测定的巨大潜力。