Abstract In this study, reduced graphene oxide-bismuth zinc sulfide nanocomposite (RGO-Bi2ZnS4) with excellent electrochemiluminescence (ECL) signal amplification were prepared by a solvothermal method and successfully used to fabricate ECL sensors to rapidly detect bisphenol A (BPA). Bi2ZnS4 can form numerous nanosheet clusters uniformly distributed on the surface of a graphene sheet, which not only avoids the phenomenon of stacking of the graphene layers due to π-π interactions, but also greatly increases the specific surface area of graphene, thus providing a wider active area and channel for the oxidation-reduction reaction on the electrode. Chitosan as a kind of immobilized adhesive, with good adhesion and good compatibility, can greatly facilitate the stabilization of Ru(bpy)32+ and RGO-Bi2ZnS4 nanocomposites on the surface of the electrode and the smooth fabrication of the subsequent sensors. Also, the electron transfer process in this system is described in detail based on the effective quenching effect of BPA on Ru(bpy)32+/tripropylamine system. At the same time, the ECL amplification performance of RGO-Bi2ZnS4 nanocomposite in the analysis and testing was evaluated by measuring the BPA concentration in actual water samples. Under optimal conditions, the fabricated ECL sensor has good sensitivity to BPA, with a linear range of 0.05–3.0 μM and a detection limit of 0.02 μM. In this study, a convenient and promising solution for the rapid detection of BPA or its environmental hormones is provided, and is also anticipated to be a reference for the analysis of other biochemical compounds.

中文翻译：

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基于还原氧化石墨烯-Bi 2 ZnS 4 纳米复合材料的双酚A电化学发光传感器

摘要 本研究采用溶剂热法制备了具有优异电化学发光（ECL）信号放大能力的还原氧化石墨烯-硫化铋锌纳米复合材料（RGO-Bi2ZnS4），并成功用于制备ECL传感器以快速检测双酚A（BPA）。Bi2ZnS4可以形成无数均匀分布在石墨烯片表面的纳米片簇，既避免了由于π-π相互作用而导致石墨烯层堆积的现象，而且大大增加了石墨烯的比表面积，从而提供了更广泛的应用范围。电极上氧化还原反应的活性区域和通道。壳聚糖作为一种固定化粘合剂，具有良好的附着力和良好的相容性，可以极大地促进 Ru(bpy)32+ 和 RGO-Bi2ZnS4 纳米复合材料在电极表面的稳定和后续传感器的顺利制造。此外，基于BPA对Ru(bpy)32+/三丙胺体系的有效猝灭作用，详细描述了该体系中的电子转移过程。同时，通过测量实际水样中的BPA浓度来评价RGO-Bi2ZnS4纳米复合材料在分析测试中的ECL放大性能。在最佳条件下，制备的 ECL 传感器对 BPA 具有良好的灵敏度，线性范围为 0.05-3.0 μM，检测限为 0.02 μM。本研究为快速检测BPA或其环境激素提供了一种方便且有前景的解决方案，