School of Biomedical Engineering, South-Central Minzu University, Wuhan 430074, China.
Key Laboratory of Cognitive Science, State Ethnic Affairs Commission, Wuhan 430074, China.
Int J Mol Sci. 2024 Sep 11;25(18):9829. doi: 10.3390/ijms25189829.
Effectively detecting catechol (CC) and hydroquinone (HQ) simultaneously is crucial for environmental protection and human health monitoring. In the study presented herein, a novel electrochemical sensor for the sensitive simultaneous detection of CC and HQ was constructed based on an electrochemically reduced graphene oxide (ERGO)-modified multi-walled carbon nanotube paste electrode (MWCNTPE). Scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and electrochemical techniques were utilized to characterize the sensing interface and investigate the sensing mechanism. Under the optimal detection conditions, the oxidation peak currents of CC and HQ show a good linear relationship with their concentrations in the range of 0.4-400 μM with a detection limit of 0.083 μM for CC and 0.028 μM for HQ (S/N = 3). Moreover, the sensor exhibits good performance and can be applied successfully in the simultaneous detection of CC and HQ in tap water samples and urine samples with satisfactory results, indicating its promising application prospects.
有效检测儿茶酚（CC）和对苯二酚（HQ）对于环境保护和人类健康监测至关重要。在本文研究中，基于电化学还原氧化石墨烯（ERGO）修饰的多壁碳纳米管糊电极（MWCNTPE），构建了一种用于同时灵敏检测 CC 和 HQ 的新型电化学传感器。采用扫描电子显微镜、X 射线光电子能谱、拉曼光谱和电化学技术对传感界面进行了表征，并研究了传感机制。在最佳检测条件下，CC 和 HQ 的氧化峰电流与其浓度在 0.4-400 μM 范围内呈良好的线性关系，CC 的检测限为 0.083 μM，HQ 的检测限为 0.028 μM（S/N = 3）。此外，该传感器表现出良好的性能，可成功应用于自来水样和尿样中 CC 和 HQ 的同时检测，结果令人满意，表明其具有广阔的应用前景。
