Amino-functionalized multilayer Ti3C2Tx enabled electrochemical sensor for simultaneous determination of Cd2+ and Pb2+ in food samples. (15th February 2023)

• Record Type: Journal Article
• Authors: Chen, Yuanyuan; Zhao, Peng; Hu, Zhikun; Liang, Yi; Han, Haiyan; Yang, Mei; Luo, Xiaogang; Hou, Changjun; Huo, Danqun
• Is Part Of: Food chemistry. Volume 402(2023)
• Publication Date: 2023-02-15
• Subjects: Functionalized Ti3C2Tx MXene -- Electrochemical sensor -- Heavy metal ions; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.134269
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: Multilayer NH2 -Ti3 C2 Tx was firstly applied to electrochemical determination of Cd 2+ and Pb 2+ . The suggested mechanism for Cd 2+ and Pb 2+ determination was deeply clarified. Cd 2+ and Pb 2+ in real food samples were accurately determined. Abstract: Herein, amino-functionalized multilayer titanium carbide (NH2 -Ti3 C2 Tx ) was developed and applied to electrochemical sensor for simultaneous determination of Cd 2+ and Pb 2+ . The NH2 -Ti3 C2 Tx was prepared by grafting (3-amino-propyl) triethylsilane (APTES) onto the surface of Ti3 C2 Tx . Its morphology, crystal structure and chemical composition were characterized by field emission scanning electron microscope (FESEM), X-ray diffractometer (XRD), and X-ray photoelectron spectroscopy (XPS). Benefiting from the unique multilayer structure, large active surface area, strong adsorption capacity and excellent electrical conductivity, the functionalized NH2 -Ti3 C2 Tx presented satisfactory electrochemical performances for Cd 2+ and Pb 2+ determination, and the detection limits were 0.41 μg L −1 and 0.31 μg L −1, respectively. Based on chemical coordination and electrochemical accumulation, the suggested mechanism for Cd 2+ and Pb 2+ determination was also deeply clarified. Besides, it was successfully applied to simultaneous determination of Cd 2+ and Pb 2+ in food samples including rice, wheat, sorghum and corn, demonstrating a good practicability.