مشخصات پژوهش

In this study, MXene quantum dots-functionalized polyethylenimine was composited with melamine-based covalent organic framework (MXene QDs-PEI/COF) and utilized for sensitive and selective determination of Hg2+ in water samples using diferential pulse anodic stripping voltammetry (DPASV). The prepared pencil graphite electrode-modifed MXene QDs-PEI/COF was carefully characterized with feld emission scanning electron microscopy, Fourier transform infrared, X-ray difraction, fuorescence spectroscopy, electrochemical impedance spectroscopy, and cyclic voltammetry in detail. Electroactive surface area of the PGE/MXene QDs-PEI/COF was calculated to be 0.23 cm2 which was remarkably improved in comparison with PGE/COF and PGE/MXene QDs-PEI with the surface areas of 0.0067 and 0.189 cm2 . The obtained results with DPASV technique for Hg2+ determination resulted a linear analytical response (R2 = 0.9944) in the concentration range of 50 nM to 35 µM, with the sensitivity of 16.973 µA µM−1 cm−2 and detection limit of 16 nM (S/N = 3). The developed method was utilized carefully for mercury analysis in Caspian Seawater and tap water samples with suitable precision and accuracy