Department of Chemistry, Northeastern University, Shenyang, 110819, China.
Sci Rep. 2024 Oct 21;14(1):24759. doi: 10.1038/s41598-024-76495-7.
Carbon cloth (CC) was electrochemically activated using three electrochemical methods in different electrolytes. The gases released during the activation process etched the surface of the CC, thereby increasing its surface area of the activated CC (FCC). Moreover, functional groups such as oxygen-containing groups and N-doping have been introduced. The quantity and type of functional groups introduced during the activation process were related to the anions in the solution. FCC electrodes were used to construct electrochemical sensors for the simultaneous determination of ascorbic acid (AA), dopamine (DA), and uric acid (UA). The PFCC electrode activated by advanced cyclic voltammetry in (NH)HPO showed linear ranges for AA, DA, and UA concentrations of 0.1 to 2.1 mM, 0.5 to 11 µM, and 0.5 to 11 µM, respectively. The detection limits are 72.93, 0.22, and 0.42 µM, respectively. The good flexibility the PFCC electrode made it suitable for the preparation of flexible sensors. The simultaneous determination of AA, DA, and UA in fetal bovine serum showed a reliable recovery ratio. This study provides a simple and green approach for activating carbon cloth and constructing flexible electrochemical sensors with the potential to simultaneously detect AA, DA, and UA.
碳纤维布（CC）分别在不同的电解液中通过三种电化学方法进行电化学活化。在活化过程中释放的气体刻蚀了 CC 的表面，从而增加了其比表面积（FCC）。此外，还引入了含氧基团和 N 掺杂等官能团。在活化过程中引入的官能团的数量和类型与溶液中的阴离子有关。使用 FCC 电极构建电化学传感器，用于同时测定抗坏血酸（AA）、多巴胺（DA）和尿酸（UA）。在（NH）HPO 中通过先进的循环伏安法活化的 PFCC 电极对 AA、DA 和 UA 的浓度分别具有 0.1 至 2.1 mM、0.5 至 11 µM 和 0.5 至 11 µM 的线性范围。检测限分别为 72.93、0.22 和 0.42 µM。PFCC 电极具有良好的柔韧性，使其适合制备柔性传感器。在胎牛血清中同时测定 AA、DA 和 UA 显示出可靠的回收率。本研究为活化碳纤维布和构建具有同时检测 AA、DA 和 UA 潜力的柔性电化学传感器提供了一种简单、绿色的方法。
