Plasmonic photocatalyst has attracted significant attention due to its valuable theoretical study and promising practical applications in solar cells, functional composites, and sensors. Herein, an interesting RGO–C₃N₄-supported AuAg core–Au shell (AuAg@Au) nanocomposite has been reported. Due to the surface plasmon resonance (SPR) of AuAg@Au and the accelarated electron transfer and separation of charge carriers induced by the fascinating RGO–C₃N₄ substrate, the newly-generated AuAg@Au/RGO–C₃N₄ nanomaterials show a strong photo-electrochemical response under visible-light irradiation. The AuAg@Au/RGO–C₃N₄ photocatalyst demonstrated an excellent photo-electrochemical performance with a broad concentration linear range of 0.064–780.904 μM and a low detection limit of 0.022 μM, high stability, and good selectivity when applied in the determination of dopamine (DA) under visible-light irradiation.

中文翻译：

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用于检测DA的AuAg @ Au / RGO–C ₃ N ₄纳米复合材料的等离子体和光电化学增强

等离子体化学光催化剂由于其有价值的理论研究和在太阳能电池，功能复合材料和传感器中的有希望的实际应用而备受关注。在此，已经报道了一种有趣的由RGO–C ₃ N ₄支撑的AuAg核–Au壳（AuAg @ Au）纳米复合材料。由于AuAg @ Au的表面等离子体共振（SPR）以及引人入胜的RGO–C ₃ N ₄底物诱导的电子转移和电荷载流子的分离，因此产生了新的AuAg @ Au / RGO–C ₃ N ₄纳米材料。在可见光照射下显示出很强的光电化学反应。AuAg @ Au / RGO–C ₃ N ₄ 当在可见光照射下测定多巴胺（DA）时，光催化剂表现出优异的光电化学性能，浓度线性范围为0.064–780.904μM，检出限低至0.022μM，具有很高的稳定性和选择性。