Enhanced simultaneous voltammetric detection of lead, copper, and mercury using a MIL-101(Cr)-(COOH)2@MWCNTs modified glassy carbon electrode

Abstract

Electrochemical methods, particularly those utilizing sensors, offer distinct advantages over classical analytical methods. They are cost-effective, compatible with mass fabrication, suitable for remote sensing, and can be designed as handheld analyzers. In this context, MIL-101(Cr)-(COOH)₂@MWCNTs was utilized for the first time as a modifier for GCE for the sensitive voltammetric detection of Pb(II), Cu(II), and Hg(II). The surface characteristics of the composite were examined using SEM, EDX, XRD, FTIR, and N₂ adsorption/desorption isotherms. The electrochemical behavior of the modified electrode was investigated using differential pulse anodic stripping voltammetry (DPASV).