Electroanalytical approach for the detection of 2,4-diaminotoluene based on electrochemically reduced graphene oxide-carboxylic single walled carbon nanotubes

Abstract

In this study, an innovative electrochemical detection platform for detecting 2,4-diaminotoluene (2,4-DAT) was effectively created. The platform is constructed of electrochemical reduced graphene oxide- carboxylic single walled carbon nanotubes (ErGO-CSWCNTs) directly deposited on the surface of electrode. Characterizations of the developed platform were conducted using ultraviolet-visible (UV-vis) spectroscopy, electrochemical impedance spectroscopy (EIS), atomic force microscopy (AFM), Raman spectroscopy, and scanning electron microscopy (SEM). Meanwhile, systematic electrochemical tests of 2,4-DAT on ErGO-CSWCNTs modified glassy carbon electrode (GCE) were performed. The results revealed that the ErGO-CSWCNTs/GCE exhibited a good electrochemical response to 2,4-DAT, featuring a linear range from 4.0 × 10−7 mol L−1 to 8.5 × 10−5 mol L−1 and a detection limit of 8.0 × 10−8 mol L−1. In addition, the proposed method exhibited an excellent selectivity, stability, reproducibility, and was applied successfully for determination of 2,4-DAT content from conventional food packaging materials.