Cheng Shiqi, Lin Zhongwei, Qin Shangying, Huang Li, Yang Jin, Wang Yilin
School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi University, Nanning, 530004, China.
Anal Methods. 2023 Aug 24;15(33):4142-4148. doi: 10.1039/d3ay00914a.
A 3D reduced graphene oxide (3DrGO) composite loaded with cauliflower-like MoS was prepared. Benefiting from the synergistic effects of 3DrGO and cauliflower-like MoS, a glassy carbon electrode (GCE) modified with the 3DrGO-MoS composite (3DrGO-MoS/GCE) displays high sensing performance for sunset yellow (SY) and tartrazine (TZ) at working potentials of 0.795 and 1.034 V. Furthermore, a well separated oxidation peak potential can achieve simultaneous detection of the two analytes. Under selected conditions, the peak current exhibits a piecewise linear relationship with the SY concentration in the range of 0.05-10 μmol L and 10-60 μmol L, and the plot of peak current the TZ concentration also exhibits two linear segments in the range of 0.1-6.0 μmol L and 6.0-60 μmol L. The detection limits of SY and TZ are as low as 17.6 and 37.4 nmol L, respectively. The prepared 3DrGO-MoS/GCE was applied for the determination of SY and TZ in food samples with excellent recoveries of 95.1-105.4%.
制备了负载花椰菜状MoS的3D还原氧化石墨烯（3DrGO）复合材料。得益于3DrGO与花椰菜状MoS的协同效应，用3DrGO-MoS复合材料修饰的玻碳电极（GCE）（3DrGO-MoS/GCE）在0.795和1.034 V的工作电位下对日落黄（SY）和柠檬黄（TZ）表现出高传感性能。此外，良好分离的氧化峰电位能够实现对两种分析物的同时检测。在选定条件下，峰电流在0.05 - 10 μmol L和10 - 60 μmol L范围内与SY浓度呈分段线性关系，峰电流与TZ浓度的曲线在0.1 - 6.0 μmol L和6.0 - 60 μmol L范围内也呈现两个线性段。SY和TZ的检测限分别低至17.6和37.4 nmol L。所制备的3DrGO-MoS/GCE用于食品样品中SY和TZ的测定，回收率极佳，为95.1 - 105.4%。
