A flexible electrochemical sensor based on Fe-doped polydopamine derived carbon for simultaneous detection of dopamine and uric acid†

IF 2.6 3区化学 Q2 CHEMISTRY, ANALYTICAL Analytical Methods Pub Date : 2024-09-03 DOI:10.1039/D4AY00980K

Xinyu Wang, Wenbin Wang, Meng Gao, Min Fu, Linzheng Ma and Wei Chen

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Abstract

A free-standing electrode based on carbon cloth-supported Fe-doped polydopamine-derived carbon (Fe/PDA-C/CC) was developed for the simultaneous detection of dopamine (DA) and uric acid (UA). First, dopamine was self-polymerized on the surface of the carbon cloth to obtain polydopamine coatings. Subsequently, Fe³⁺ was introduced through the formation of a coordinate bond with the hydroxyl functional group in the polydopamine layer. After calcination, a flexible and free-standing electrode was obtained. The sensing performance and mechanism of the Fe/PDA-C/CC sensor was investigated and is discussed in detail herein. Experimental results demonstrated that Fe/PDA-C/CC could simultaneously detect DA and UA with a wide detection range of 0.5–300 μM and 0.5–400 μM with low detection limits of 0.041 μM and 0.012 μM, respectively. Meanwhile, Fe/PDA-C/CC possessed excellent anti-interference performance, repeatability, stability, and accuracy in real samples. Overall, this study provides a facile and effective approach for simultaneous detection of UA and DA.

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基于掺杂铁的多巴胺衍生碳的柔性电化学传感器，用于同时检测多巴胺和尿酸

基于碳布支撑的掺杂铁的聚多巴胺衍生碳（Fe/PDA-C/CC）开发了一种独立电极，用于同时检测多巴胺（DA）和尿酸（UA）。首先，在碳布表面自聚多巴胺，得到多巴胺涂层。然后，通过与多巴胺涂层中的羟基官能团形成配位键引入 Fe3+。经过煅烧后，就得到了柔性独立电极。实验详细研究并讨论了 Fe/PDA-C/CC 传感器的传感性能和机理。实验结果表明，Fe/PDA-C/CC 可同时检测 DA 和 UA，检测范围分别为 0.5-300 μM 和 0.5-400 μM，检出限分别为 0.041 μM 和 0.012 μM。同时，Fe/PDA-C/CC 在实际样品中具有良好的抗干扰性、重复性、稳定性和准确性。总之，该研究为同时检测 UA 和 DA 提供了一种简便有效的方法。

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