Abstract：
In this study, an electrochemical sensor based on MoS2 with enhanced electrochemical signals from electrochemically activated carbon cloth (EACC) electrodes and cross-linked o-aminothiophenol functionalized AuNPs (o-ATP@AuNPs) was developed for the detection of the unsaturated vegetable oil antioxidant tert-butylhydroquinone (TBHQ). In this approach, carbon cloth is activated through the implementation of electrochemical methods, thereby effectively increasing its specific surface area. The resulting EACC, serving as an electrode substrate, enables the growth of additional nanomaterials and enhances conductivity. The incorporation of MoS2 effectively augments the sensitivity of the electrochemical sensor. Subsequently, MIP/MoS2/EMCC is formed via electropolymerization, utilizing TBHQ as the template molecule and o-ATP@AuNPs as the functional monomer. The SS bond of o-ATP ensures a strong and stable connection between MoS2 and o-ATP@AuNPs, thereby facilitating the immobilization of MIP. In addition, the high conductivity possessed by o-ATP@AuNPs could effectively improve the sensitivity of the electrochemical sensor. Under the optimal conditions, MIP/MoS2/EMCC could determine TBHQ in the range of 1 × 10-3 μM to 120 μM by differential pulse voltammetry (DPV) with a detection line of 0.72 nM. The proposed MIP/MoS2/EMCC is expected to be applied in the future for the selective and sensitive detection of TBHQ in vegetable oils.
摘要：
在这项研究中,开发了一种基于MoS2的电化学传感器，该传感器具有来自电化学活化碳布（EACC）电极和交联邻氨基苯硫酚官能化AuNPs（o-ATP@AuNPs）的电化学信号，用于检测不饱和植物油抗氧化剂叔丁基对苯二酚（TBHQ）。在这种方法中，碳布是通过实施电化学方法活化的，从而有效地增加其比表面积。由此产生的EACC，作为电极基板，使额外的纳米材料的生长和增强导电性。MoS2的结合有效地增强了电化学传感器的灵敏度。随后，MIP/MoS2/EMCC通过电聚合形成，利用TBHQ作为模板分子，o-ATP@AuNP作为功能单体。o-ATP的SS键确保MoS2和o-ATP@AuNPs之间强大而稳定的连接，从而促进MIP的固定化。此外,o-ATP@AuNPs具有较高的电导率,可以有效提高电化学传感器的灵敏度。在最优条件下,MIP/MoS2/EMCC可以通过差分脉冲伏安法（DPV）以0.72nM的检测线确定1×10-3μM至120μM范围内的TBHQ。提出的MIP/MoS2/EMCC有望在将来用于植物油中TBHQ的选择性和灵敏检测。
