State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing, 102249, China.
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum-Beijing, Beijing, 102249, China.
Chemosphere. 2022 Jul;298:134326. doi: 10.1016/j.chemosphere.2022.134326. Epub 2022 Mar 15.
Present work depicted a novel electrochemical sensor fabricated with magnetic carbon dots (M-CDs) and cetyltrimethylammonium bromide (CTAB) modified glassy carbon electrode (GCE) for selective measurement of 3,3',5,5'-tetrabromobisphenol A (TBBPA) in beverages. The M-CDs composite material revealed good electrocatalytic activity, and CTAB has strong hydrophobic interaction which enable it have good enrichment capacity of hydrophobic compounds, and combination of them further enhances the electrochemical signal. Hence CTAB decoration can markedly improve the detection performance of TBBPA. Electrochemical properties of the fabricated sensor was investigated through performing cyclic voltammetry (CV). The morphology and functional groups of the modified materials were examined with transmission electron microscope (TEM) and Fourier transform infrared spectroscopy (FTIR). The results indicated that the synthesized material had a spherical-like structure, good dispersion properties and plenty of functional groups on the surface. The effects of incubation potential, incubation time, pH of electrolyte, and scanning rate on oxidation peak current were investigated. Under optimal conditions, the designed sensor had good linear range of 1 nM-1000 nM, and the detection of limit of the constructed sensor was 0.75 nM. The constructed sensor was utilized to detect TBBPA in vitamin water, scream drink and genki forest, and satisfactory detection performance had been achieved.
本工作描述了一种新型电化学传感器，该传感器由磁性碳点 (M-CDs) 和十六烷基三甲基溴化铵 (CTAB) 修饰的玻碳电极 (GCE) 制备，用于选择性测量饮料中的 3,3',5,5'-四溴双酚 A (TBBPA)。M-CDs 复合材料显示出良好的电催化活性，CTAB 具有强疏水性相互作用，使其对疏水性化合物具有良好的富集能力，两者的结合进一步增强了电化学信号。因此，CTAB 修饰可以显著提高 TBBPA 的检测性能。通过循环伏安法 (CV) 研究了制备传感器的电化学性质。使用透射电子显微镜 (TEM) 和傅里叶变换红外光谱 (FTIR) 检查了修饰材料的形貌和官能团。结果表明，所合成的材料具有球形结构、良好的分散性和表面上丰富的官能团。研究了孵育电位、孵育时间、电解质 pH 值和扫描速率对氧化峰电流的影响。在最佳条件下，设计的传感器具有 1 nM-1000 nM 的良好线性范围，构建传感器的检测限为 0.75 nM。该传感器用于检测维生素水中的 TBBPA、尖叫饮料和元气森林，取得了令人满意的检测效果。
